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Mathematics Questions and Answers November 03, 2021

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Given the following matrix A , find an invertible matrix U so that A is equal to UR , when R is the reduced row-echelon form of A : You can resize a matrix (when appropriate) by clicking and dragging the bottom-right corner of the matrix. \f
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9 Incorrect Marked out of 4.00 Flag question Question text Solve for x (1/6) x = 7776

When analysing histograms What does a standard deviation of .674 mean?

factor x^2+8x+15 answer should be two polynomials in length

While keeping the height of the cone constant, move the vertex of the cone so that it is not directly above the center of the base. Check the Allow oblique and Freeze height boxes to assist you. Does changing the position of the vertex affect the volume if the height remains the same? Why or why not? (Hint: Think of the cone as a stack of disks of

4 of 20 A continuous random variable O can take on an infinite number of possible values O can take on only a countable number of distinct values 5 of 20 An example of a discrete random variable is O the time it takes to answer this question the number of items sold at a store on a certain day O the marathon time of a given runner O how much a

If given triangle qrs is similar to xyz what is the value of tan (q)

The solar declination (subpolarpoint)on September 1stis _________________ (Round to the nearest degree)

for the given functions f and g find the indicated composition Question 17 For the given functions f and go find the indicated composition A BX B)
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How many strings of four letter are there? Repetition is premitted. Consider lower case only 26+26+26+26=104 26*4 26*25*24*23=258800 26*26*26*26=456976

Quality Motors has three plants. Plant 1 produces35% of the caroutput, plant 2 produces20% and plant 3 produces the remaining45%. One percent of the output of plant 1 isdefective, 1.8% of the output of plant 2 is defective and2% of the output of plant 3 is defective. The annual total production of Quality Motors is1,000,000 cars. A car is chosen

1. Solve the following polynomial inequality: 5 2 3 x + x 2 x + 2 2 2. Solve the following using Quadratic Formula: 0.5 x x=2 3. The number of kidney transplants from 1996 to 2005 can be expressed by the quadratic equation of y = 3.6x 2 + 578x + 13,538, where x = 0 represents the year 2000. Assume this trend continues and predict the year when

Rework problem 3 from section 3.1 of your textbook, about eventsA AandB of a sample spaceS, but assume thatPr[A]=0.4,Pr[B]=0.45 andPr[AB]=0.25 Find the probabilities of the following event: 1) Pr[A'B]

Use the Internet to research articles on confidence interval and its application in business. Select one (1) company or organization which utilized confidence interval technique to measure its performance parameters (e.g., mean, variance, mean differences between two processes, etc.). Give your opinion as to whether or not the utilization of such

What can we say about Rolle's Theorem and injectivity? Can you prove that it is an injection?

The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg.If 30 such cars are tested, what is the probability the average mpg achieved by these 30 cars will be greater than 27?

an experiment was conducted to test the effects of alcohol. The errors were recorded in a test of visual and motor skills for a treatment group of people who drank alcohol and another group given nonalcoholic drink. The results are shown below. The populations from which the sample are drawn are normally distributed. Conduct a hypothesis test at a

In Exercises 19 - 42, solve the equation, giving the exact solutions which lie in [0, 2) 34. cot4 (x) = 4 csc2 (x) 7

A solid ball T with constant density (in kg/m 3 ) is bounded by the sphere p = a. Use the spherical coordinates to compute the moment of inertia I z about the z-axis. [Distance in meters] [Show All Work]

Describe the change in the graph from f(x) to g(x) 1) f(x)=x; g(x)=x+5 2) f(x)= -3x; g(x)=3x Each transformation is performed on the line with the equation f(x)=x. Write the equation of the new line. 1) vertical translation down 3 units 2) slope increased by 4 shifted up 3 units and slope doubled

The game for these problems is keep rolling until one player rolls a 7 or 11 Can you help me with Finding the expected value of winning the game , can you show it mathematically and can you briefly explain it can you also help me with this What is the probability of winning your game less than 3 times?

the relative frequency approaches infinity. 13 of 20 When repeatedly tossing an assumedly fair die, Susan noticed that out of 100 tosses, 24 of them came up as sixes. What should be concluded about this die? The die could be defective and should be replaced. The probability of 24 / 100 sixes on a fair die is .016, which is less than .05. Susan's

many professionals work an average of 8.5 hours per day. A CEO claims the mean work day of their firm's accountants is less than 8.5 hours. A random sample of 25 of the firm's accountants has a mean work day of 8.2 hour iwht a standard deviation of 0.5 hours. At a significance level of 0.01, test the CEO's claim

99 1 i 1. Evaluate ( ) - Hint: Use the formula for the sum of terms of a 2 i=0 geometric sequence

Suppose that the functions g and h are defined for all real numbers x as follows. = g x x 6 = h x 2 x 2 Write the expressions for + g h x and g h x and evaluate g h 3 . =+ghx =ghx =gh3

5 PROBLEM 6 PROBLEM 7

The scores on the Wechsler Adult Intelligence Scale are approximately Normal with = 100 and = 15. The score needed to be among the highest 10% of all scores is closest to?

Question 1 115 pts Algebra Review Given m) = 3m + 2. what is the slope of the Secent line between {3, f{3)]end {11f(_1)}? Question 2 {1.5 pts Algebra Review Consider the following simplication of a rational function: For what value of x is this equality not tme? (3' True for all real numbers I CI More information is needed 0 Not true form = 3 CI
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Write inequalities to represent the situations below. To be eligible for financial aid, a student must earn at most $15,000 per year. Use s to represent the yearly earnings (in dollars) of a student eligible for financial aid. The temperature inside the lab refrigerator is no more than 40 F. Use T to represent the temperature (in F) of the

divide and express the result in a standard form Divide and express the result in standard form. 31 5 - 41 A 15 12 41 B C D
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20. Lillian has made several transactions in the past few days and wants to know her current balance. Find the amount of the balance forward that would result following these transactions: Starting balance: $2,128.40 June 2; check #542; to JAB Consulting; amount of $263.96 Deposit; June 19; amount of $844.96 June 24; check #543; to Vu Video;

A communications satellite is in orbit 35,300 km directly above the earths equator. What is the greatest latitude from which a signal can travel from the earths surface to the satellite in a straight line? The radius of the earth is 6,400 km.

Find a linear relationship (equation) that you would use or rely on in your field when you receive your degree, and explain what it is and how it is used. Identify the initial condition, such as the full tank of gas above, and the rate of change. For a linear equation, the rate of change (slope) needs to be constant. If you can't find one in your

Find the real solutions of the equation x + x = 56

Find the area of the specified region. 1) Inside one leaf of the four-leaved rose r=3sin2

3.10 By matching the autocovariances and sample autocovariances at lags 0 and 1, t a model of the form X. u = m.-. u) +2.. {2,} ~ WN(0. oz). to the data STRIKESTSM of Example 1.1.6. Use the tted model to compute the best predictor of the number of strikes in 1981. Estimate the mean squared error of your predictor and construct 95 % prediction

Which is ann equation of a line that passes through the point (7, 3) and is parallel to the line y =x + 3.

1. The base of the solid is the region bounded by the curve y = 2 + sin x, the y-axis, x = 0 and x = 3/2. The cross sections perpendicular to the x-axis are: a. Squares b. Equilateral triangles c. Isosceles right triangles with leg on the base d. Isosceles right triangles with hypotenuse on the base e. Semi-circles f. Quarter-circles g. Isosceles

Attached I have two questions. can you please solve them and show all of your work. \f\f
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Math 2420 (Spring 2017) Assignment #7 Problem #1: Find the intervals of convergence of the following power series at x = 0: (a) X n3n xn ; n=0 (b) X n=1 xn n10n1 Solution: (a). We apply the Ratio Test: |(n + 1)3n+1 xn+1 | n+1 |an + 1| = lim = 3|x| lim = 3|x| n n n n n n |an | |n3 x | lim So the series converges if 3|x| < 1 i.e. |x| < 13 and is

Use the standard normal probability distribution table to determine the following probabilities: a. Pr(1.76 < Z < 0) b. Pr(Z > +0.83) c. Pr(0.64 Z +2.59)

Write equations of the lines through the given point parallel to and perpendicular to the given line. 4 x + 5 y = 0,(1/2,2/7) (a) parallel to the given line (b) perpendicular to the given line

Illustrate the function and identify what the domain and range is in the problem below: Sam has $100 in his bank account and he is saving $10 per week. Provide function and identify what the domain and range is? Show calculations

I need question number 2 (A) 164,726 Euros (B) 172,577 Euros (C) 164,045 Euros (D) None of these The information that we need is shown in the table Share price. Step 1 Calculate yesterday's share price for each share Fevs plc = 1586/0.91 = 1742.86 x 50 = 87,143 Steapars = 2537/1.01 = 2511.88 x 100 = 251,188 Difference = 251,188 - 87,143 = 164,045

Hui. '."""-'.-- mm . n' ' I I I. I '- mm _ . _. . . ' .; '- I sun I I mynducum. and 7mm Juimdmmp Hm i' I I l W mole wattr qualnypmhlnns. EH tprmk: :n} - I w w mld mph in . W'z {mil m. 1.1 H T w 54. 1 1 a m D1 In." :1: 1 D , a I on rm.- n_ 1 a Inf-H '11" 5 {I 2 a Int-m: F M [W] M 1.3 p" 1 E: H- a I \f\f\f\f\f\f
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1. Assume that 3' :RE i R3 is an isnmetry of the plane. Shaw that: {a} if f xes twn pnints n. and h nf the plane. then f is a reectinn relative to the line determined by n. and b; (h) if f xes a unique pnint a, then f is a rntatinn arnund a; {e} if 1" does net x any pnint, then f is a translatinn, fnnwed pnssihly by a retatinn andfer a reeetinn.

Question 5 The number of kilograms, y, of a radioactive element that remains after t hours can be modeled by the equation y = 0.23(0.91)* What is the rate of decrease of this radioactive element? Select one: O 77% per hour O 9% per hour 91% per hour O 23% per hour
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please can anyone help me to solve this 3 questions question no {6,7 & 8} all attachments are here \fI. n- I. o. vae Theorem 2.22 {for the case of two subspaces 'R and 8 only}. '7. Let \"P" denote the vector space of polynomials of degree less than or equal to n, and of the form pix} = pg + pix + - - + + pnx", where the coefcients p; are all real.
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an object is projected upward with an initial velocity of 123 ft per sec, its height h after t seconds is h = -16t^2 +123t Find the height of the object after 22 seconds.

okay, so for my project--You have been hired by your regional real estate company to determine if your region's housing prices and housing square footage are significantly different from those of the national market. The regional sales director has three questions that they want to see addressed in the report: Are housing prices in your regional

Consider the line l in R^ 3 given parametrically by x = x 0 + t a . Let P 0 denote the plane through the origin with normal vector a (so it is orthogonal to l). a. Show that l and P 0 intersect in the point x 0 - proj a x 0. b. Conclude that the distance from the origin to l is||x 0 - proj a x 0 ||.

Q1. Find the average rate of change for the function f(x) = -3x 2 - x from the values 5 to 6. a. 1/2 b. -2 c. -34 d. -1/6 Q2. Determine where the function f(x) = -x 2 + 8x - 7 is increasing and where it is decreasing. a. increasing on (4, ) and decreasing on (-, 4) b. increasing on (-, 4) and decreasing on (4, ) c. increasing on (9, ) and

If A is a 6x5 matrix, the linear transformation x -> Ax cannot map R^6 onto R^5. True or False?

Each functions is the deman function of some item where x is the number of items sold in thousands determine the revenue function and the maximum revenue in thousands of dollars a)p(x)=-x+5

Please answer #9 3The Rolling Creek Textile Mill produces denim.The fixed monthly cost is $21,000 and the variable cost per yard of denim is $0.45.The mill sells a yard of denim for $1.30 a For a monthly volume of 18,000 yards of denim, determine the total cost, total revenue and profit A5 x 18,000 + 21,000 for total cost of 29,100 Revenue: 1.30 x

Suppose that a severe virus is impacting a bee colony and the population of bees has a half-life of 5 days. What approximate daily percentage of decay does the bee colony demonstrate? Round to two decimals. What percentage of the original bee colony would be surviving after 13days of decay?Round to two decimals.

Find the area of the region enclosed between the two curves. y=6-x^2 and y=x+4

consider f = u iv where u(x,y)=2x^2 y^2 and v=y^2/x. show that the curves u = constant and v =constant intersect orthogonally but that f is not analytic"

1. Name two monomials whose product is 54x2y3. 2. Explain how you can use the properties of exponents to compare measures on the pH scale. Demonstrate an example comparing two pH levels using the properties of exponents.

Twitter users and news, Part II.A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on Twitter, and the standard error for this estimate was 2.4%.Identify each of the following statements as true or false.

how to solve and answer in interval notation: | 8 - 7x | 6

Consider the initial value problem y+y+y = f(t), y(0) = y(0) = 0. Solve this by hand for 0 t 2 \f
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A company that manufactures mountain bikes makes a daily profit p according to the equation p equals negative 100 x squared plus 4700 x minus 50 comma 601 p=100x2+4700x50,601, where p is measured in dollars and x is the number of mountain bikes made per day. Find the number of mountain bikes that must be made each day to produce a zero profit for

Solve the following system of equations algebraically: y = x 2 10 x + 28 2 x y = 4

You are given the following dataset with the price of diamonds (in $) as a function of their length and width (in mm). Your task is to build a predictive tool that when given the measurements of a new diamond that comes in, it can return its predicted value. please see attach file to see the whole question. 4. You are given the following dataset
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Use the Venn diagram to find the requested set. Find (A UB)' \f
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MM255 Business Math and Statistical Measures 1) If I eat 1,300 pieces of fruit per year, based on my serving preference, how many of each types of fruit will I consume next year? Show all calculations. Question 2: Search the internet for a line, circle, or bar graph that either misrepresents the information being portrayed, is confusing, or

In 1992, funding for a program increased by 0.66 billion dollars from the funding in 1991. In 1993, the increase was 0.30 billion dollars over the funding in 1992. For those three years, the funding was 11.01 billion dollars. How much was funded in each of these three years?

Explain why the following expression is false. |x| < - 4 Must be explained in detail using the correct vocabulary to receive full credit.

Math 347, Project 2. DUE April 25, 2017 (Assignment turned after the due date will be penalized at the rate of 5% per day) Work in teams of size 1-3. and hand in one report per group. You may not have any of the same partners as you had for the first project. Every student is expected to be actively involved in the solving the problem as well as

Donnie Smith Assignment Section 8.6 due 04/28/2017 at 11:59pm MST Sharma MAT 266 ONLINE B Spring 2017 c3 = 1. (1 point) Consider the function c4 = 1 1 x3 Find the radius of convergence R of the series. R= . Write a partial sum for the power series which represents this function consisting of the first 5 nonzero terms. For example, if n 2n 2 2 4

Pretty sure I got this one but wanted a double check. \f\f
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PRE CALCULUS...... 15 MULTIPLE CHOICE POLAR FORM OF COMPLEX NUMBERS QUESTIONS.. MUST GET AT LEAST 14 out 15 right or you will not get points. 3' +' 35 a arcosztsuisms") '3 3(cos45"+:'sin45) 0 c0590+fsir803 O 3(c0590+:'sin90) " Save Question 2 (3 points) Write the following camplex number in polar form. Express all angles in degrees rounded to the
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Is there a study plan guide for math 215 quantitative Reasoning I am stuck on the study plan with no help to the answers.

Find the z-score for x = 8 if the mean is 7 and the standard deviation is 2. Find the percentile for x = 8 if the mean is 7 and the standard deviation is 2. For a mean of 20 and standard deviation of 5, find. P of X less or equal to 17 For a mean of 75 and a standarddeviation of 3, find. P of X greater of equal to 77 For a mean of 153 and standard

The formula for the Chi-Squared Test Statistic, written as: x2 = [(0-E) E can be interpreted plainly as: O Taking each observed value, subtracting itsexpected value, squaring this, and then dividing by the expected value. O Taking each observed value, subtracting its expected value, squaring this, dividing by the observed value, then summing this

You have just received$195,000from the estate of a long-lost rich uncle. If you invest all your inheritance in a tax-free bond fund earning6.8%compounded quarterly, how long do you have to wait to become a millionaire? (Round your answer to two decimal places.) yr

a) SDASBJZ A b) 59,388.12 e) .'59,418.12 IF!) 5934312 7 V V' ' e) 59,428.12 ' f') Nonc of the above. Wakmn 5 Framing Art Inc. will need to purchase two new cashier machines in 2 years, at a cost ofk8137 EMIL-AA saVings amount pays fi: pm? yam! kng How much shauld Framing Art Inc. deposit now in this account to have the cash availableuin 2 tpv'pa'y

Susan Wong's Personal Budgeting Model Susan Wong wants to develop a linear programming model for her budget. The objective is to maximize her short-term investments during the year so she can take the money and reinvest at the end of the year in a longer-term investment program. Susan has $3000 in her bank account at the beginning of this year.

Please someone help me I did all them correct except the thrid one so pleaseeeee give me good answer A company produces very unusual CD's for which the variable cost is $ 8 per CD and the fixed costs are $ 50000. They will sell the CD's for $ 93 each. Let _ be the number of CD's produced. Write the total cost C as a function of the number of CD's
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A researcher conducts a study that examines the relationship between dementia and restraint use. A 95% confidence interval is selected (alpha=.05). If the p-value = 0.03, what is the correct conclusion? A. Reject the null hypothesis B. Accept the null hypothesis C. A type 1 error has occurred D. A type 2 error has occurred

1) Consider Kn, the complete graph on n vertices. Explain how you calculated your answers. a) What is the degree of each vertex? b) How many edges does K n have?

Let A be a subset of [0,+).Assume that the sum of any finitenumber of elements inAis no greater than 1, i.e.,mN and a1, a2, ..amA, a1+a2+...am1. Show thatAis countable. And there is a hint:try to writeAas the union of a sequenceof finite sets.

Question 6 The table of values below represents a periodic function. What is the period of the function? Angle Y-value 0 -2 TT 3 2TT 8 3TT 3 4TT -2 Select one: O 3 O O 8 O 47T
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GSB 420 The following data on the Dow Jones Industrial Average (DJIA), and share prices of IBM, HOG (=Harley Davidson), and BUD (=Budweiser) are obtained from the http://finance.yahoo.com website for the February 2 - 13, 2015 period. DJIA and Share Prices of IBM, HOG, and BUD Date DJIA IBM HOG BUD 2-Feb-15 17,361.04 154.66 61.68 123.2 3-Feb-15

A 9.3 ft tall adult elephant standing next to a lawn ornament casts a 14.9 ft shadow. If the lawn ornament is 3.1 ft tall, then how long is its shadow? ID: 35

Show all work to receive full credit. Clearly indicate your answers. Erase or cross out all work you do not want considered. Each problem is worth 4 points. 1. Find the standard matrix of the linear transformation T(x, y, z) = (x 2y + z, y 2z, x + 3z). 2. Let T be the reflection through the xz-coordinate plane in R3 : T(x, y, z) = (x, y, z). (a)

1.Mr. and Mrs. Average want to have $15,000 six years from now for their daughter's college expenses. How much must they deposit now into a savings account that pays 2.8% interest compounded quarterly? 2.Calculate the future value of an increasing annuity of $200 per month for five years at 12% interest compounded monthly. 3.Earl goes to his bank

MATH 234 Mock Final Exam x+2 . 2 x 8x 5 1. Find the value of lim (a) 1/8 (b) -2/5 (c) 0 (d) + 2. Find the value of lim x2 2x+5 |x+2| . (a) 2 (b) + (c) -2 (d) 3. Find f 0 (x) if f (x) = (a) f 0 (x) = ln x . x2 1 2x2 (b) f 0 (x) = x24 (c) f 0 (x) = 12 ln x x3 (d) f 0 (x) = 1+2 ln x x3 4. Find the derivative of (1 + x4 x1 )5/3 . (a) 5 3 (1 + x4 x1

Find the indicated limit, if it exists. (Please see the attachment) Please give me some steps and show me how to do it:) Thank you so much! \f
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A) A sample of size 108 from a population having standard deviation = 9 produced a mean of 41. The 99% confidence interval for the population mean (rounded to two decimal places) is: 1) The lower limit is 2) The upper limit is B) The mean federal income tax paid last year by a random sample of 30 persons selected from a city was$4295. Suppose the

o 1 p When computing a confidence interval for the difference of two proportions, what would the point estimate be? O The difference of the sample proportions O z(SE) O Zero The difference of the population proportions

Inverse Functions Please show that the given function is one-to-one and find its inverse. Check your answers algebraically and graphically. Verify that the range of f is the domain of f 1 and vice-versa. f 1 (x) = (x 3) 3 + 2 Exponential and Logarithmic Functions Please solve the equation analytically 150 =75 1 + 29e -0.8t

) A sales firm receives an average of four calls per hour on its toll-free number. For any given hour, find the probability that it will receive exactly five calls. Use the Poisson distribution.

I'm confused why the answer is not 6? If you could please show the steps that would help me a lot Use properties of limits and algebraic methods to nd the limit, if it exists. (If the limit is innite, enter 'm' or '-m', as appropriate. If the limit does not othenuise exist, enter DNE.) lim x}, where x} = x-3 1273;: ifx
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Adam and Brenda are selling flower bulbs for a school fundraiser. Customers can buy bags of windflower bulbs and packages of crocus bulbs. Adam sold 2 bags of windflower bulbs and 6 packages of crocus bulbs for a total of $116. Brenda sold 7 bags of windflower bulbs and 12 packages of crocus bulbs for a total of $253. What is the cost each of one

evaluate 10 - [4 x 3 + 3 x (6 - 4) 3 ] 6 x (2 + 3) + 7 x 3 - 3 2 x {-1 + 4 x [2 - 3 x (-3 + 4) 2 ] 2 }

Pretty sure I got this one right but I wanted to make sure because i always seem mess up with a ^1/2 exponent. \f
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y=f^1(x), f(x) = square root 6+x;x>=-6 Determine if the function is one-to-one. provide an equation for the inverse function in the form y = f -1 ( x ), and give the domain and the range of f and f -1 .

When looking at how often an event or finding will happen by chance, experimenters use: Group of answer choices Range indicators Variability indexes Random number generators P values Algorithmic statistics

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