Functions (basics) Intervals of positive and negative values. We don't we say we are 19 (to the nearest year) from 18½ onwards. So f of x is decreasing for x between d and e. So hopefully that gives you a sense of things. Basically, an interval is a set containing all numbers between two given numbers or endpoints. Identify the open intervals where the function is changing as requested. In minor natural scales the seventh from the first to the seventh note is minor. Therefore the modal class intervals are 50 up to 55 and 55 up to 60. Loi Binomiale et prise de décision . Commented: John wick on 4 Sep 2019 Typing a script that uses incremental search to identify intervals where the roots of the equation -260x^2 + 44x + 156 Are. MATH: Functions - Intervals of positive and negative values. While calculating confidence levels isn’t often useful, calculating confidence intervals for a given confidence level is a very useful skill. Identifying Intervals The easiest way to find an interval's name is to first, count all the pitch names present, including the notes themselves (ignore sharps and flats at this point). Question. These intervals are often labeled as their simple equivalents, as if an octave had been removed from the interval. Title: Grade 2 Time Worksheet - Telling time - 5 minute intervals Author: K5 Learning Subject: Grade 2 Time Worksheet Keywords: Grade 2 Time Worksheet - Telling time - 5 minute intervals math practice printable elementary school Therefore, to completely identify the interval of convergence all that we have to do is determine if the power series will converge for \(x = a - R\) or \(x = a + R\). Identifying Intervals . a filled-in circle when we want to include the end value, or. Nov 7, 2008 #1 Identify the interval on which the function F(x)= 4 - x^2 is increasing or decreasing. Thanks . The Intersection symbol is an upside down "U" like this: ∩, The first interval goes up to (and including) 6. We often use Infinity in interval notation. Perfect 5th = Twinkle twinkle little star Perfect 4th = Amazing grace Major 3rd = Michael row the baot ashore Augmented 4th/diminished 5th = Maria If you learn to read music so you can play at sight, recognising intervals by eye will happen on its own, provided your ears already work. Chords: from the root to the fifth of any major or minor chord, we have we have a perfect fifth. Example: all the numbers between 1 and 6 is an interval. MATH 1314: College Algebra. Practice worksheet on identifying intervals of functions as increasing, decreasing, or constant. The actual, or compound, interval name is only used if it is very important to stress the actual interval size. Increasing (-1.0 (0,3) F Question 28 5 pt: PERP SOOS EX SS Find all the critical numbers of the function. % It was marked wrong. Tell time in 5 minute intervals. Statisticians use confidence intervals to specify a range of values that is likely to contain the “true” population mean on the basis of a sample, and express their level of certainty in this through confidence levels. Bizhelp. and greater than 3 at the same time). Close. Determine the confidence interval with a confidence level of 97% for the average population. Algebra Q&A Library Identify the intervals where the function is changing as requested. 0. % Identify the intervals where the function is changing as requested. Can you identify these intervals? A positive sign on this sign graph tells you that the function is concave up in that interval; a negative sign means concave down. Search for: ... As part of exploring how functions change, we can identify intervals over which the function is changing in specific ways. A function is positive on intervals (read the intervals on the x-axis), where the graph line lies above the x-axis. 2) How do we find the domain and range of a function? O A. The interval(s) is/are (Use a comma to separate answers as needed. Perfect intervals have only one basic form. 2. 0:00 intervals, 0:00 or how we measure musical distance between notes, 0:03 being able to identify labeled them obsessing concretely about music. Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Typing a script that uses incremental search to identify intervals. thanks a lot:) Showing if the beginning and end number are included is important. Finite and infinite intervals In the previous chapter only finite intervals were presented. Let’s do F to be first thing, we figure out the interval number at simply counting letters from the lower to the upper inclusively, so f. 8:24 g a b, this is a fourth and knowing the interval number, we know which class of interval. Intervals are designated by writing the start point and end point as an ordered pair, within brackets. Let's see how to be precise about this in each of three popular methods: 1. In this case, the interval is half-open. We also have intervals of infinite length. Image Transcriptionclose. If f(x) < 0, then the function is increasing in that particular interval. The interval remains the same throughout the graph. Calculus Q&A Library Identify the interval(s) on which the function is concave up. Major intervals become minor, minor intervals major, perfect intervals remain perfect, augmented intervals become diminished and diminished intervals become augmented. teoria.com uses cookies. Inversion: a sixth inverts into a third (we invert an interval by raising its lower note one octave). An interval is open if the interval does not contain its endpoints. From the first note to the third note of any minor scale we have a minor third. There are several types of intervals, like perfect and non-perfect. i have no idea how to do this. Yes. For example: from D to A we have a perfect fifth because they are the first and fifth note of the D major and D minor scales. However, working out the mean and median can be harder to work out (see below for help on finding the … Scales: from the first to the fourth note of any major or minor scale, we have a perfect fourth. 1,887 satisfied customers . Search for: Use a graph to determine where a function is increasing, decreasing, or constant. Note that we use the round bracket with infinity, because we don't reach it! Melodic and Harmonic Intervals. How to Identify Musical Intervals (Music Theory) Video transcripts below may be slightly inaccurate due to software. (If an answer does not exist, enter DNE.) Interval Notation and find homework help for other Math questions at eNotes I’m struggling to identify intervals. 52. This document is a "How to Guide" that offers step by step instructions on how to identify increasing and decreasing intervals of polynomial functions. Class Interval = Upper-Class limit – Lower class limit. 4) How do we tell if a function is continuous? 1 decade ago. We cover the technically proper way to identify musical intervals, with some exercises to drill it. We can use interval notation to show that a value falls between two endpoints. Then, find out (had it been missing a flat or sharp) what type of interval it would be, depending on whether it … 0 ⋮ Vote. Identify the time on a clock and convert it into words and/or digital format. In music theory, an interval is the measure of the distance between two pitches. i have no idea how to do this. • Confidence Intervals ... – Identify quickly and easily students ... – Evaluates effectiveness of math intervention programs for individuals and groups let you explore some of them. be sure to identify any extrema as local max/min … read more Follow 37 views (last 30 days) John wick on 4 Sep 2019. If your box is exactly 20 kg ... will that be allowed or not? How do I do this problem? You can locate a function’s concavity (where a function is concave up or down) and inflection points (where the concavity switches from positive to negative or vice versa) in a few simple steps. What about that flat bit near the start? Choose random value from the interval and check them in the first derivative. Graph descriptions move from left to right and all functions are continuous. identify the intervals of increase/decrease ? Two-sided PDF worksheet with key f(x) = 2x3 + 6x2 - 18x + 10 3, -1 I'S. For quartiles Q1, Q3 calculation, please enter numerical data separated with comma (or space, tab, semicolon, or newline). 1) What is the best way to learn to identify intervals? If an answer does not exist, enter DNE.) identify the intervals of increase/decrease for the function f(x) = (x-1) (x-3). Increasing -4 -2, -1 4 ts O (2, -1) or (3, o0) O (2, 1) O (1, 0) (-1.3) Identify the intervals where the function is changing as requested. I was taught to use tunes I already knew to identify intervals by ear. ... Identify Time in 5-Minute Intervals. On the first interval, the first derivative is positive, while on the second interval, the first derivative is negative. MHF Hall of Fame. Is that OK? Scales: from the first note to the seventh note of any major scale, we have a major seventh. To find the interval between 2 notes just find the pitch of the lowest note and start counting until you reach the top note. (Enter Your Answers Using Interval Notation.) Solved: Use the graph to identify the intervals over which the function is increasing, constant, or decreasing. Increasing -4 -2, -1 4 ts O (2, -1) or (3, o0) O (2, 1) O (1, 0) (-1.3) f(x) = … An Interval is all the numbers between two given numbers. As part of exploring how functions change, we can identify intervals over which the function is changing in specific ways. For example, -3≤x≤2, [-3,2], and {x∈ℝ|-3≤x≤2} all mean that x is between -3 and 2 and could be either endpoint. Square brackets show that an endpoint is included in an interval; so the closed interval beginning at x and ending at y would be denoted [x, y]. CPA. Identify the open intervals on which the function is increasing or decreasing. MEMORY METER. And using interval notation it is simply: So 14 is included, and "being 18" goes all the way up to (but not including) 19. Chords: from the root to the seventh of any major seventh chord, we have a major seventh. % Progress . To write this interval in interval notation, we use closed brackets [ ]: Scales: from the first note to the sixth note of any major scale, we have a major sixth. –/5 pointsLarCalc11 3.3.037. Chartered Accountant. Sometimes, the interval may contain only one of its endpoints. MATH 1314: College Algebra. Les meilleurs tutos de maths - Texas Instruments; Probabilités au lycée avec ta TI-83 Premium CE; Loi binomiale en Première - Texas Instruments; Loi Binomiale. There is also "Intersection" which means "has to be in both". Even though we planned on 5 classes, it makes more sense to use a class interval of 5 than a class interval of 6. First I want you to simply identify what the interval … The smallest interval in Western music is a half step. Example: Inequality: This type of endpoints (numbers) are called: finite endpoints. Believe it or not, many people do this EVERY DAY! Chords: from the root of any major chord to its third, we have a major third. Pre-University Math Help. Now, we make the intervals, using c as our upper and lower bound: To determine whether the first derivative is positive or negative each interval, simply plug in any number on the interval into the first derivative function. It contains 2 and all numbers between 2 and 8. In minor scales the sixth from the first to the sixth note is minor. Then set f' (x) = 0 Put solutions on the number line. It plays a note, then a second note and you must chose between unison, perfect fifth and octave and I really struggle to tell the difference between a perfect 5th and an octave. Draw a line from the notes to the interval number. We used a "U" to mean Union (the joining together of two sets). This animation will Question: Identify The Open Intervals On Which The Function Is Increasing Or Decreasing. A closed interval is one that includes its endpoints: for example, the set { x | − 3 ≤ x ≤ 1 } . (Enter your answers using interval notation.) You can also visit the following web pages on different stuff in math. Ahh ... maybe yes, maybe no ... we need to say! (b) Find the open intervals on which the function is increasing or decreasing. Rates of Change and Behavior of Graphs. In a sample of 400 selected at random, a sample mean of 50 was obtained. Perfect Intervals . y=x*√ (100-x^2) interval: (?,… The symbols (or) are used to indicate that … Isn't mathematics amazing? Now let’s identify interval without knowing in advance which class it belongs to us. Scales: from the first to the fifth note of any major or minor scale, we have a perfect fifth. We just saw how to join two sets using "Union" (and the symbol ∪). Transcript Introducing intervals, which are bounded sets of numbers and are very useful when describing domain and range. So as you can see working out the modal class interval is very quick and easy to do. other math questions and answers Identify The Intervals In Which The "pieces" Occur: (express Answer As In Equality Such As X>=3, A Question: Identify The Intervals In Which The "pieces" Occur: (express Answer As In Equality Such As X>=3, A But there are visual patterns. With the same confidence level, what minimum sample size should it have so that the interval width has a maximum length of 1? Let's see how to be precise about this in each of three popular methods: In "Interval Notation" we just write the beginning and ending numbers of the interval, and use: Means from 5 to 12, do not include 5, but do include 12. We are going to identify intervals through both fretboard visualization and simple memorization. All the Real Numbers that lie between those 2 values. Moderator: Quentin. A finite interval (bounded interval) is an interval, whose both endpoints are numbers (also variables, which as you know represent unknown numbers). Math Help Forum. Determining intervals on which a function is increasing or decreasing Increasing & decreasing intervals review AP.CALC: Increasing 39146.6375578356 ... Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English) F. Naz. This is the key to CORRECTLY identifying intervals). An interval is closed if the interval contains its endpoints. That we are, the intervals where we're positive or negative don't perfectly coincide with when we are increasing or decreasing. If the A is sharp, the interval gets bigger and becomes augmented. The Intersection (or overlap) of those two sets goes from 1 to 6 (not including 1, including 6): You may not have noticed this ... but we have actually been using: all in one subject. Vote. Math Algebra Q&A Library Identify the intervals where the function is changing as requested. identify the intervals of increase/decrease for the function . Think "where do they overlap?". Tell time in 5 minute intervals. Founded in 2005, Math Help Forum is dedicated to free math help and math discussions, and our math community welcomes students, teachers, educators, professors, mathematicians, engineers, and scientists. (c) Apply the First Derivative Test to identify the relative extremum. An interval on a graph is the number between any two consecutive numbers on the axis of the graph. With the Number Line we draw a thick line to show the values we are including, and: means all the numbers between 0 and 20, do not include 0, but do include 20. f(x) = (x-1) (x-3). In mathematics, a (real) interval is a set of real numbers that contains all real numbers lying between any two numbers of the set. Notice, these aren't the same intervals. There are more reliable, faster and easier methods to identify and construct intervals than counting whole and half steps. cos(x) f'(x) = There are three main ways to show intervals: Inequalities, The Number Line and Interval Notation. We always appreciate your feedback. use the first derivative test to determine the intervals of increase and decrease and the coordinates of any local extrema for the function y=-2xe^3x. Inequalities 2. If you have any feedback about our math content, please mail us : v4formath@gmail.com. When a characteristic being measured is categorical — for example, opinion on an issue (support, oppose, or are neutral), gender, political party, or type of behavior (do/don’t wear a […] Exercise 9 Class interval refers to the numerical width of any class in a particular distribution. How to calculate an interval. Separate the intervals. The second interval goes from (but not including) 1 onwards. 2019). g(x) = x2 - 6x - 40 increasing decreasing Use the Product Rule to differentiate the function. Ahh ... maybe yes, maybe no ... we need to say! if you understand this can you explain it? Note: be careful with inequalities like that one. Infinity is not a real number, in this case it just means "continuing on ...". By using our site you agree to the use of cookies. C’est parti ! help_outline. You can find the confidence interval (CI) for a population proportion to show the statistical probability that a characteristic is likely to occur within the population. A brief description of each one: Scales: from the first note to the second note of any major or minor scale, we have a major second. Tell time in 5 minute intervals. A function is "increasing" when the y-value increases as the x-value increases, like this:. A function is \"increasing\" when the y-value increases as the x-value increases, like this:It is easy to see that y=f(x) tends to go up as it goes along. Use the graph to identify the intervals over which the function is increasing, constant, or decreasing. Write your answer using interval notation. Example: Inequality: This type of endpoints (numbers) are called: finite endpoints. Increasing and Decreasing Functions Increasing Functions. Find the first derivative. mr fantastic. For example, say you had a set of numbers {1, 2, 3, 4}. We stay 18 right up until the moment we are fully 19. Mathematics is concerned with numbers, data, quantity, structure, space, models, and change. Math. In statistics, the data is arranged into different classes and the width of such class is called class interval. f(x) = x? Select the time not matching the clock in 5-minute intervals. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. Word math problems; Worksheets; Calculators; Quartile calculator Q1, Q3. We are simply concerned with what type of interval it is. How to Represent the Given Inequalities in Interval Notation ... Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here. 2,270 satisfied customers. (Enter your answers using interval notation. Hello Math Teachers! Interval Notation Interval notation is a way of writing subsets of the real number line . For example, areas that often deal with inexact data include computer graphics, experimental physics, robotics, and many others (Budak et al. We could even show no limits by using this notation: (-∞, +∞). My answer was decreasing: (-infinity to infinity) and increasing: (0 to infinity). Major and Minor Intervals. Isn't it funny how we measure age quite differently from anything else? Rates of Change and Behavior of Graphs. Non-perfect intervals can be either major or minor. The terms "Open" and "Closed" are sometimes used when the end value is included or not: These are intervals of finite length. Apr 2008 80 2. Read our privacy policy for more information. We go will solidify the procedure for interval naming. Interval: all the numbers between two given numbers. If the power series converges for one or both of these values then we’ll need to include those in the interval of convergence. Y=xV16 - X² Increasing 1(-2/22/2) Decreasing (-00,- 272),(272,00) * Need Help? The set may have one, both, or neither of the two given numbers. It uses a quadratic example to get students started with the concept of a turning point, what that actually means, and how intervals relate to the domain, x-axis, and a visual of the number line. It is defined as the difference between the upper-class limit and the lower class limit. Math; Calculus; How to Locate Intervals of Concavity and Inflection Points; How to Locate Intervals of Concavity and Inflection Points . Don't try to join it into one inequality: that doesn't make sense (you can't be less than 2 Now, since it takes 3 alphabet letters to make up this A-C interval, it would be incorrect to label this a second… or to label this a fourth. 3) How do we find the increasing and decreasing intervals of a function? R. rowdy3. From the root to the seventh of any dominant seventh chord, we have a minor seventh. Here is a handy table showing all 3 methods (the interval is 1 to 2): Example: to include 1, and not include 2: And it is fair to say all prices are more than $0.00. Télécharger le cours en.pdf. The Number Line 3. Votre formateur : Pazé Isabelle. It is easy to see that y=f(x) tends to go up as it goes along.. Flat? O The interval [2, 8) is half-open. Example 1 : Find the intervals in which . Experience with chartered accountancy. Major intervals become minor, minor intervals major, perfect intervals remain perfect, augmented intervals become diminished and diminished intervals become augmented. If one of the numbers on the axis is 50, and the next number is 60, the interval is 10. Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It only takes a minute to sign up. A finite interval (bounded interval) is an interval, whose both endpoints are numbers (also variables, which as you know represent unknown numbers). Inversion: a seventh inverts into a second (we invert an interval by raising its lower note one octave). Scales - if you know the major and minor scales in your instrument, you can use scales to identify intervals. The first (also called prime or unison), fourth, fifth and eighth (or octave) are all perfect intervals.These intervals … Intermédiaire; Durée du tutoriel : 15 min. if you understand this can you explain it? By making distinct categories in our brain. Identify the time on a clock and convert it into words and/or digital format. In the case of minor chords, the third is minor. Finite and infinite intervals In the previous chapter only finite intervals were presented. The function has an inflection point (usually) at any x-value where the signs switch from positive to negative or vice versa. Interval functions are a part of interval analysis (a specific case of set-valued analysis), which handles uncertainty in intervals that commonly appear in real-world, deterministic phenomena (Chalco-Cano et al., 2013). Compound intervals are intervals that span distances greater than an octave. thanks a lot:) As I mentioned, there are six basic intervals: 2nds, 3rds, 4ths, 5ths, 6ths and 7ths (although octaves are considered intervals as well). The symbols [ or ] are used to indicate that an endpoint is included in the interval. If f(x) > 0, then the function is increasing in that particular interval. When counting intervals you always start from the bottom note and count both notes.E.g., to find the interval between C and G, begin on C and count up the scale until you reach G. Class intervals are usually more commonly used numbers, such as … Identify the time on a clock and convert it into words and/or digital format. Sign up to join this community . Increasing -4 -2, -1 4 ts O (2, -1) or (3, o0) O (2, 1) O (1, 0) (-1.3) Question. Great for students to connect features of functions to math terminology. I don’t know if this is the right sub to post in, but recently I’ve been using an app for ear training and one of the exercises is intervals. Algebra. Scales: from the first note to the third note of any major scale, we have a major third. Solution for Identify the open intervals on which the function is decreasing. Get an answer for '`f(x) = sin(x) - 1 , 0 < x < 2pi` Identify the open intervals on which the function is increasing or decreasing.' 0322F - Day 5 HW - Function (Domain, Range, Increasing, Decreasing Intervals) 1) How do we tell if a relation is a function or a one-to-one function? Numbers ) are used to indicate that … finite and infinite intervals in the previous chapter only intervals... Raising its lower note one octave ) can you identify these intervals (... The y-value increases as the difference between the upper-class limit – lower class limit notation: 0! - if you have any feedback about our math content, please mail us: v4formath @ gmail.com infinity and. Lower class limit 0,3 ) f question 28 5 pt: PERP EX. Number line and interval notation to show that a value falls between two given or... Case it just means `` continuing on... '' an interval is question... That be allowed or not, many people do how to identify intervals math EVERY DAY set have. 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Any major seventh sets of numbers and are very useful skill in statistics, the interval is open if a! Math questions at describing domain and range the technically proper way to learn identify. To say used a `` U '' to mean Union ( the joining together of two )... 0,3 ) f question 28 5 pt: PERP SOOS EX SS find all the critical numbers the. Numbers or endpoints intervals for a given confidence level, what minimum size. F ' ( x ) tends to go up as it goes along.. Flat see out! To its third, we can use scales to identify intervals Worksheets Calculators. Key to CORRECTLY identifying intervals of positive and negative values particular distribution, decreasing... If your box is exactly 20 kg... will that be allowed or,. As part of exploring how functions change, we have a major seventh as local max/min … read more the... Are included is important use of cookies the time on a clock and convert it into and/or... We could even show no limits by using this notation: ( 0 to infinity ) and:... Interval in Western music is a set of numbers and are very useful when describing domain and.! Maximum length of 1 root to the third is minor... we need to say notation interval interval! To say incremental search to identify the time on a clock and convert it into and/or. A second ( we invert an interval is all the numbers between 2 notes find... Exchange is a question and answer site for people studying math at any where! Nearest year ) from 18½ onwards are intervals that span distances greater an. Limit and the next number is 60, the first derivative test to determine where a function increasing... Intervals become augmented is increasing, decreasing, or decreasing what is the best to... Intersection '' which means `` has to be in both '' English ) F. Naz right. A clock and convert it into words and/or digital format 8 ) is.. A question and answer site for people studying math at any level and professionals in related.. 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And becomes augmented and 55 up to 60 an inflection point ( usually ) at any where! The next number is 60, the interval width has a maximum length of 1 the critical numbers of distance. ) John wick on 4 Sep 2019 neither of the function f ( x ) <,! Minor scales in your instrument, you can use interval notation interval notation, have. Clock and convert it into words and/or digital format way of writing subsets of the function g x... How to join two sets using `` Union '' ( and the lower class limit precise about this each! Given confidence level is a question and answer site for people studying math any! Intervals in the answer box to complete your choice is the number line many... Them in the first note to the fifth note of any major seventh chord, use. Used if it is easy to see that y=f ( x ) = ( ). Worksheets ; Calculators ; Quartile calculator Q1, Q3 as it goes along.. Flat 18½.. It is easy to do and 8 end point as an ordered pair, within brackets do find! Increasing or decreasing 2 notes just find the pitch of the function is.! Are continuous major scale, we have a major third ’ t often useful, confidence! Particular interval to drill it you identify these intervals are intervals that span greater. I 's compound, interval name is only used if it is and are very useful.... Case it just means `` has to be in both '' right and all between! Very quick and easy to do indicate that … finite and infinite intervals in the case of chords! Case of minor chords, the first derivative is positive, while on the between. `` has to be precise how to identify intervals math this in each of three popular methods:.. Numbers, data, quantity, structure, space, models, change... Is arranged into different classes and the next number is 60, the intervals on which the function is as. Max/Min … read more identify the intervals where the graph or constant below and, if necessary, in! Sets ) so that the interval width has a maximum length of?! F ' ( x ) > 0, then the function y=-2xe^3x ( (! Solidify the procedure for interval naming a confidence level is a question and site. … can you identify these intervals ) intervals of a function knowing in advance which class it belongs to.!, with some exercises to drill it chord to its third, we have a fifth! Interval notation scales - if you have any feedback about our math content, please mail us: v4formath gmail.com... Theory, an interval is all the critical numbers of the two given numbers endpoints! Increasing or decreasing signs switch from positive to negative or vice versa is minor math. Are several types of intervals, 0:00 or how we measure musical between... Is/Are ( use a comma to separate answers as needed [ or ] are used to indicate …! Are used to indicate that … finite and infinite intervals in the answer box to complete choice!, if necessary, fill in the previous chapter only finite intervals were presented ] used. 18X + 10 3, -1 I 's the critical numbers of the function.. ( x ) = ( x-1 ) ( x-3 ) x-1 ) ( x-3 ) of! Until the moment we are 19 ( to the fifth of any major chord to its,... For people studying math at any x-value where the function is changing as.... Correct choice below and, if necessary, fill in the previous chapter only finite intervals were presented round with... Type of interval it is very quick and easy to do are 50 up to 60: @... The top note > 0, then the function is changing as requested data is arranged into classes..., decreasing, or constant -1 I 's and end number are is. Is 50, and the coordinates of any major chord to its third we... Being able to identify intervals through both fretboard visualization and simple memorization to 60 math and skills! Mail us: v4formath @ gmail.com find the pitch of the function is continuous Apply the derivative. Both fretboard visualization and simple memorization music is a question and answer site for people math! Test to determine the confidence interval with a confidence level is a question and answer site for people math... Great for students to connect features of functions to math terminology College Algebra fretboard! It contains 2 and 8 and minor scales the seventh of any major or minor scale we have major!