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Mathematics Questions and Answers March 09, 2023

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1) Find the area of the region inside:r=9sinbut outside:r=3 2)Find the exact length of the polar curve described by: r = 6 e^( ) on the interval 1 2 5 125 .

Use technology to find the P-value for a right-tailed test with nequals=88and test statistic t equals 3.561 .t=3.561. P-valuealmost equalsnothing(Round to four decimal places as needed.)

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1. Workshop 4: Workshop Four - 4.6 Dropbox Complete the following problems from your textbook: a. Chapter 8: a.i. Problems for Section 8.3: 8.32 a.ii. Chapter Review Problems: 8.64, 8.67 b. Chapter 18: b.i. Chapter Review Problems: 18.48, 18.49, 18.50 2. Submission requirements are as follows: a. One Excel workbook (file) with multiple worksheets.

uiz 4 The sampling distribution of the sample mean Select one: a. is the probability distribution showing all possible values of the sample mean b. is used as a point estimator of the population mean m c. shows the distribution of all possible values of m d. is an unbiased estimator

You volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters who applied for promotion and the

A hollow circular post ABC (see figure) supports a load P 1 16 kN acting at the top. A second load P 2 is uniformly distributed around the cap plate at B. The diameters and thicknesses of the upper and lower parts of the post are d AB 30 mm, t AB 12 mm, d BC 60 mm, and t BC 9 mm, respectively. The lower part of the post must have the same

Can you please help me understand what R squared in a regression model stands for? What does it mean and how can it be useful?

Program Level Assessment Fall 2016 Job opportunity surveys have consistently shown a high demand for those who can use mathematics to model complex processes and make informed predictions of the future. A student should be able to demonstrate his or her level of sophistication with respect to the key, in-demand skills of communication,

Explain what the break-even or equilibrium point means in terms of manufacturing. How do you find that point? How does a system of equations help determine this point?

Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation.A random sample of 200 high school seniors from this city reveals that 162 plan to attend college.Does this indicate that the percentage has increased from that of previous studies?Test at the 5% level of significance.

1.The Willow Run Outlet Mall has two Haggar Outlet Stores, one located on Peach Street and the other on Plum Street. The two stores are laid out differently, but both store managers claim their layout maximizes the amounts customers will purchase on impulse. A sample of ten customers at the Peach Street store revealed they spent the following

6. A function f : Z Z Z is defined as f (m,n) = 3n 4m. Verify whether this function is injective and whether it is surjective. 8. A function f : ZZ ZZ is defined as f (m,n) = (m+ n,2m+ n). Verify whether this function is injective and whether it is surjective.

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Hypothesis test for a Population Mean, Sigma Known If the population standard deviation is known, we can directly calculate the standard deviation of the sampling distribution (the standard error of the estimate), and use the standardized normal distribution to get a z multiple, using the Excel function NORMSINV. We can then calculate p for each

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The exponential distribution is the only continuous distribution to have the memoryless property (we showed this in terms of the geometric distribution). a. Prove ????(????>????+????|????>????)=????(????>????) b. Whenever you purchase a lightbulb, the package will display the mean lifetime. It turns out that such lifetimes are exponentially

1.which intervals can be contrasted using one sample interval computations on the differences? paired,pooled, nonpaired , how do you determine pooled vs non pooled? 2. true mean $2.75 random sample 100 current price is $2.65 with standard dev. .20 conduct test at 10% significance level -state assumptions and if they are met define pararmeters,

Caleb has 7 black caps, 4 yellow caps, and 9 blue caps in his wardrobe. Two caps are drawn without replacement from the wardrobe. What is the probability that both of the caps are blue? Thank you.

I'm having trouble with the math section on the GRE's. Is there anyone that could assist me with my siutation?

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Suppose the lifespan of a Mayfly has exponential distribution with parameter (indays). A child puts n them in a jar (with food and holes for air) and returns one daylater to find that r flies are dead. What is her maximum likelihood estimate for ?The girl is intrigued, so she repeats the experiment. This time she stays up all day andall night,

Experiment 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 0 0 0 0 1 0 0 1 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 1 0 0 1 0 1 0 0 0 0 0

Show your work or explain how you arrived at your conclusion whenever appropriate. 1. In 2008 the stock market crashed. During this time, a survey of adult investors were asked how often they tracked their portfolio. The table below shows the investors responses. Find the probability that an adult investor does not track his or her own portfolio.

Negative Equity (being "underwater") refers to a scenario where the market value of a residence is worth less than the outstanding balance on the mortgage for that home. Suppose the Federal Housing Administration which is the government agency charged with supporting the home financing market, would like to test the hypothesis that the proportion

The patient recovery time from a surgical procedure is normally distributed with a mean of 5.3 days and standard deviation of 2.1 days. SHOW WORK (a) What is the probability of spending more than 2 days in recovery after a surgical procedure? (b) What is the 90 th percentile for recovery time after a surgical procedure

Suppose that it rains in Spain an average of once every14days, and when it does, hurricanes have a9%chance of happening in Hartford. When it does not rain in Spain, hurricanes have a 5%chance of happening in Hartford. What is the probability that it rains in Spain when hurricanes happen in Hartford? (Round your answer to four decimal places.)

Find the area of the infinite region in the first quadrant between the curve y=e -x and the x-axis. Type an integer or a simplified fraction.

De acuerdo a los datos proporcionados, se desea saber si el suelo medio semanal de las enfermeras fue superior al de los maestros de escuela primaria. Para investigar lo anterior, recopilaron la siguiente informacin muestral. Maestros de escuela ($): 845, 826, 827, 875, 784, 809, 802, 820, 829, 830, 842, 832. Enfermeras ($): 841, 890, 821, 771,

for the following demand function, find a. E and b. the values of q (if any) at which total revenue is maxmized. q= 36400-9p^2 a determine the elasticity of demand E E= (type an expression using p as the variable.) b determine the value of q that maxmimzes the reveune. total reveune is maxmized at about q= (round the nearest whole number as

Probablitiy QNT/351 Version 5 University of Phoenix Material PROBABILITY Maximum and Minimum Temperatures Karina Visloukh Sunday, May 15, 2016 Quantitative Analysis for Business / QNT/351 Sara Skowronski Copyright 2016 by University of Phoenix. All rights reserved. 1 Probablitiy QNT/351 Version 5 1. Prepare a spreadsheet with three columns: Date,

5) Traveler's Insurance would like to test the hypothesis that the average number of miles driven per month by a male teenage driver exceeds the average number of miles driven per month by a female teenage driver by more than 50 miles. The following data summarizes the sample statistics for the miles driven per month by each gender. Assume that

M1. The x- and y- coordinates of a moving particle are given by the parametric equations below. Find the magnitude and the direction of the velocity for the specific value of t. Sketch the curve and the show the velocity and its components. x=3t, y=4-t, t=3 A) Find the direction of the velocity of the particle for the specific value of t. Enter an

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You'll need access to multisim for screenshots. VT= 120Vrms, 60Hz, 0Deg R1=1 kohms R2=3kohms R3=4kohms Watch the videos Week 1 Video Lecture 1 - Introduction to Virtual Instruments Week 1 Video Lecture 2 - Introduction to Virtual Breadboarding in MultiSIM Construct the circuit of problem 1 in the Assignment with MultiSIM. Take screenshots to

Meg's pension plan is an annuity with a guaranteed return of4%per year (compounded quarterly). She would like to retire with a pension of$50,000per quarter for25years. If she works41years before retiring, how much money must she and her employer deposit each quarter? HINT [See Example 5.] (Round your answer to the nearest cent.) $ 11./7.14

A television station is interested in predicting whether or not voters are in favor of an increase in the state sales tax. It asks its viewers to phone in and indicated whether they support or are opposed to an increase in the state sales tax in order to generate additional revenue for education. Of the 2633 viewers who phone in, 1474 (55.98%) are

evaluate each function at the indicated values of the independent variable and simplify the result 1. f(x)= 9-6x a. f(-1) b. f(1) c. f ( -3 + x)

Many musical composers have used mathematics in their compositions. Some artists have created artworks that use or reflect mathematical principles. Research one such composer or artist, and write an essay discussing the role of mathematics in the composers music or artists art. Make sure you describe the mathematical concepts that are present in

Chapter 13: Staff Planning at Valley Memorial Hospital 1.Evaluate plans 1, 2, and 3, and write up your conclusions in a memo that Gardner can share with the Nursing council. Evaluate each plan in terms of customer service, cost, operational implementation, and human resource issues. 2. Develop your own plan for next year, evaluate it, and explain

1.A cereal manufacturer tests their equipment weekly to be assured that the proper amount of cereal is in each box of cereal. The company wants to see if the amount differs from the stated amount on the box. The stated amount on each box for this particular cereal is 12.5 ounces. The manufacturer takes a random sample of 100 boxes and finds that

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Based on FAA estimates the average age of fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with a standard deviation of 1.7 years. Suppose that 40 airplanes were randomaly selected from fleets of these 10 carriers and were inspected for cracks in these airplanes that are considered too large for flying. What is the

Bonus A random sample of size 16 is taken from the populationand 95% confidence interval for the population mean is found to be (25, 35). Find thepopulation variance. Question 21 options: 104 10 30 5 15 20 Bowling league members bowled at two different locations. At the location with oiled lane a sample of 35 bowling has mean score 205.5 and

Bon Air Elementary School has 300 students. The principal of the school thinks that the average IQ of students at Bon Air is at least 110. To prove her point, she administers an IQ test to 20 randomly selected students. Among the sampled students, the average IQ is 108 with a standard deviation of 10. Based on these results, should the principal

A distribution is given as X~U(0,12) Find P(x>3) (Enter an exact number as an integer, fraction, or decimal.)

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The intregal using the indicated trig substitution.( use C for the constant) the intregal of x^3 / square root of x^2 +16 dx , X=4tantheta

is corelation allowed as a pointer of existing conditions in research?

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1. rev: 03_18_2016_QC_CS-46019 A population consists of the following five values: 2, 2, 4, 5, 6. a. List all samples of size 3, and compute the mean of each sample. (Round sample means to 2 decimal places.) Sample Values 1 2, 2, 4 2 2, 2, 5 3 2, 2, 6 4 2, 4, 5 5 2, 4, 6 6 2, 5, 6 7 2, 4, 5 8 2, 4, 6 9 2, 5, 6 10 4, 5, 6 Sum Mean b. Compute the

20. Compared with Europeans, American employees use less vacation time. Average Vacation Time for Europeans and Americans OONO Ole (13th Vacation Time (weeks) Italy Germany France England US. Source: The State of Working America 2006/2007 The average time Italians spend on vacation exceeds the average American vacation time by 4 weeks. The

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The Graduate Record Examination (GRE) is a test required for admission to many U.S. graduate schools. Students scores on the quantitative portion of the GRE follow a normal distribution with mean 150 and standard deviation 8.8. (Source: http://www.ets.org/.) A graduate school requires that students score above 160 to be admitted. a. What

The distance from home plate to dead center field in a certain baseball stadium is 403 feet.A baseball diamond is a square with a distance from home plate to first base of 90 feet. How far is it from first base to dead center field?

I have proposed that propane vehicles will ultimately reduce operating costs. The issue is that propane delivery vehicles cost on average 8000 dollars more than diesel vehicles ($65,000 and 83,000 on average) If my dependent variable is dollars saved (because eventually I need to make up the additional $8000 I spent on the propane vehicle) the

" Normal Distribution " ( Note : Please respond to one [1] of the following two [2] bulleted items) Take a position on whether or not the total area under a normal distribution is innite. Provide an example to support your response. From the e-Activity, discuss whether or not the winning history of the team you selected follows a normal

How would I find the answer to this problem? I am not very statistic savvy. A finance manager employed by an automobile dealership believes that the number of cars sold in his local market can be predicted by the interest rate charged for a loan. Interest Rate (%) Number of Cars Sold (100s) 3 10 5 7 6 5 8 2 The finance manager performed a

Math215 Statistical Concepts Franklin University Coin Toss Project Part One: Subjective Probability (Your Guesses) Before tossing the coins, make the following predictions. Remember the rule of a probability distribution is that the sum of all possible mutually exclusive outcomes has to be one (1). Note that getting exactly 3 heads and getting

A statistician would like to create a 90% confidence interval for the true proportion of county residents who are registered to vote to within 5%. How many individuals should be included in the sample?

Use technology to find the P-value for a two-tailed test with n=16 and test statistic t=3.232. P-______(Round to four decimal places as needed.)

Suppose the Acme Drug Company develops a new drug, designed to prevent colds. The company states that the drug is more effective for women than for men. To test this claim, they choose a a simple random sample of 100 women and 200 men from a population of 100,000 volunteers. At the end of the study, 38% of the women caught a cold; and 51% of the

Yuri's dad needs fertilize the front yard. the back yard measures 55ft by 30 ft,whilethe front yard is square with a length of 42 ft on each side. yuri's dad wants to rope off the two areas to keep people from disturbing the lawn after he fertilizes the grass.how much rope will he need to go around both areas?

Control charts are monitoring schemes, widely used in operations and manufacturing environments, to determine when a process is in-control and in the presence of only common-cause variation. Give an example of an application of control charts in an industrial, operations, or manufacturing setting that is different from those supplied in the

Discuss how can correlation and regression might be useful in the real world whether it be personally, by companies, by our society, or even by our government. Also, think about ways in which having such knowledge and ability to predict can benefit you. For example, you might want to think about what variables you would like to see a correlation

An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 2.7 non-work-related e-mails per hour. Assume the arrival of these e-mails is approximated by the Poisson distribution. a. What is the probability Linda Lahey, company president, received exactly 2 non-work-related e-mails

Hold Service Rating Customer Consultant Experience ID 84583 84628 84634 84666 84680 84717 84818 84913 84932 84971 85031 85070 85099 85164 85175 85279 85289 85300 85386 85486 85588 85637 85717 85785 85802 85899 85936 86022 86039 86081 86181 86279 86375 86466 86539 86546 86560 86591 86611 86673 86710 86796 86896 86943 87000 87090 87116 87180 87206

A candy company claims that its jelly bean mix contains 15% blue jelly beans. Suppose that the candies are packaged at random in small bags containing about 200 jelly beans. What is the probability that a bag will contain more than 20% blue jelly beans? (This is an open ended question, so if possible can you let me know which equation you used and

Find the monthly interest payment in the situation described below. Assume that the monthly interest rate is 1 divided by 1/12of the annual interest rate. You maintain an average balance of 450on your creditcard, which carries 24%annual interest rate.

5 patients qualify to have a surgical procedure performed. The doctor states that there is an 80% chance of a successful surgery. The random variable x represents a successful surgery. Find the following probabilities. Please set up your probabilities, show all steps for solving and use the equation editor to format your equations. Probability of

The birth rate in a certain city is described by the following function 6.92-0.01t^2 The city's death rate is given by 5+0.02t^2 Here,tis measured in years, andt= 0 corresponds to the start of the year 1990. The birth and death rates are measured in thousands of births or deaths per year. At the start of 1990, the population of the city is 450

31rev3.dvi Justify the cylindrical shell method for computing the volume of a solid of revolution. What Rie- mann sums arise from shells? Explain how these Riemann sums arise. What integral do these sums approximate?

1 Recently, a report was published describing a string of cases of Norwalk virus gastroenteritis among passengers on cruise ships. From this report, an epidemiologist went on to form a number of hypotheses as to why there had been this rather unusual increase in reported gastroenteritis outbreaks on cruise ships in 2012. The cruise ship owners

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Income ($1000s) Household Size Amount Charged ($) 67 5 4764 55 6 4110 52 2 4208 62 3 4219 64 2 2477 22 3 2514 29 4 4214 39 2 4965 35 1 4412 39 4 2448 54 3 2995 23 6 4171 27 2 5678 26 7 3623 61 2 5301 30 2 3020 22 4 4828 46 5 5573 66 4 2583 50 5 3866 31 2 3586 55 2 5037 37 1 3605 40 2 2,921 66 4 4,603 51 3 4,273 25 3 3,067 48 4 3,074 27 1 4,820 33

A representative of a reputable financial services company has approached you as manager of a four-person group of anesthesiologists with an opportunity to purchase a 10-year annuity due for each member of the group. The annuity due would pay $40,000 each year beginning 5 years from now (i.e., at time = 5). What is the most you would be willing to

Calculations must be done on word, every step must be shown. 1. Suppose the following LPP together with its formulation and MS output: [b:4p., the rest 2p each Innis Investments manages funds for a number of companies and wealthy clients. The investment strategy is tailored to each client's needs. For a new client, Innis has been authorized to

ductory Statistics Third Edition Perdisco Assessment Below is a set of assessable homework questions on this topic, selected by your professor. Take care! Do not submit your answers until you have read all the instructions and answered the questions carefully. When you submit your answers, you will receive immediate feedback. Navigating this page:

Mountain States Surgery Center in Denver, Colorado, performs many knee replacement surgery procedures each year. Recently, research physicians at Mountain States have developed a surgery process they believe will reduce the average patient recovery time. The hospital board will not recommend the new procedure unless there is substantial evidence

Let X have a Weibull distribution with parameters and . Please prove that E(X) = (1 + 1/ ).

Find the polar coordinates of the point. Then, express the angle in degrees and again in radians, using the smallest possible positive angle. (-23, 2) The polar coordinates of the point are__________. (Simplify your answer. Type an ordered pair. Type the coordinate for in radians. Type an exact answer, using as needed. Use the integers or

Let F(x,y) be the statement x can fool y, where the domain of discourse for both x and y is all people. (a) Use quantiers to express each of the following propositions in symbols. (i) Nobody can fool me. (ii) Anybody can fool Fred . (iii) Everyone can fool someone . (b) Now write the negation of those propositions in symbols. The cheap way would

MATH 2413 HW 2.2 Due Wednesday, September 16 (1) The graph below is of the function f . Sketch a graph of f . 2.5 -2.4 -1.6 -0.8 0 0.8 1.6 2.4 3.2 4 -2.5 (2) The gure below shows the graph of f, f , and f . Identify each curve and explain your reasons. 1.6 0.8 -1.5 -1 -0.5 0 0.5 1 1.5 2 -0.8 -1.6 (3) (4) (5) (6) Find the derivative of each

Data analysts often look for a simple transformation of data that simplifies the overall pattern. Here is an example of how transforming the response variable can simplify the pattern of a scatterplot. The population of Europe grew as follows between 1750 and 1950. Year 1750 1800 1850 1900 1950 Population (million) 125 187 274 423 594 a. Make a

20f2 Exercise 4 (5 pt) Reminding that, if an is a geometric sequence with common ration r 75 1, then YI 1 - 1! S" := zak = L") k=l calculate the following 5 z 53-k k=0 n-l : 910k k=0 Exercise 5 (8 pt) The second term of n geometric senenee is 6 and the third one. is with p 96 2. Find the common ratio and the sum, assuming that the sum of the first

A sample of 400 Regina households is selected and several variables are recorded. Which of the following statements is correct? a) Total household income (in $) is interval level data. b) Socioeconomic status (recorded as low income, middle income, or high income is nominal level data. c) The number of people living in a household is a discrete

An investigator theorizes that people who participate in a regular program of exercise will have levels of systolic blood pressure that are significantly different from that of people who do not participate in a regular program of exercise. To test this idea the investigator randomly assigns 21 subjects to an exercise program for 10 weeks and 21

construct a sampling distribution for a mean Using the same population distribution for each, construct the distribution of sample means for n=4 and n= 30.Take at least 5,000 samples. (assume the distribution is NOT normal. A.How are your two distributions of sample means similar? How are they different? B.Describe how your results relate to the

A United Nations report shows the mean family income for Mexican migrants to the United States is $25,980 per year. A FLOC (Farm Labor Organizing Committee) evaluation of 22 Mexican family units reveals a mean to be $30,540 with a sample standard deviation of $9,650. Does this information disagree with the United Nations report? Apply the 0.01

A website reported that 31% of drivers 18 and older admitted to texting while driving in 2009. In a random sample of 200 drivers 18 years and older drawn in 2010, 52 of the drivers said they texted while driving. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the actual proportion of people who texted while

BA-3400: Quantitative Methods - II BONUS QUIZ (10 Bonus Points) 1. Statistics is an art and technique for systematically: a. Recording data. b. Analyzing data. c. Interpreting data. d. Collecting data. e. All of these. 2. A measure of any attribute, belief, or attitude, taking data from the entire population is referred as, a. Statistic b.

Hi, in this question: -A bank has determined that the monthly balances of the saving accounts of its customers are normally distributed with an average balance of $1,200 and standard deviation of 250. If a sample of 36 customers is selected, a. What is the probability that the average monthly balances are between $1,255 and $1,275? b. What is the

1. Rev Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.50 gallons. From his records, he selects a random sample of 45 sales and finds the mean number of

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STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL3/US2 Page 1 of 8 STAT 200 OL3/US2 Sections Final Exam Summer 2016 The final exam will be posted at 12:01 am on August 5, and it is due at 11:59 pm on August 7, 2016. Eastern Time is our reference time. This is an open-book exam. You may refer to your text and other course

LUNA ELECTRONICS Luna electronics is an established firm that sells primarily through its catalog operation, though it does have a small cadre of retail stores. In this regard it has some similarities to the better-known Sharper Image operation. Luna has recently produced a potential new product that it calls the "Holographic Imaging Televiewer

M222 Modeling Business Decisions Spring 2016 Problem Set 7 Due Friday April 22 by 6pm Question 1: Air pollution in Beijing has been a very serious problem in recent years. Air pollution has a negative impact on health, particularly the health of infants. As a policymaker in Beijing, you want to investigate if providing air filters to households

Listed below are the accounts and their respective balances for J & K, Inc. at December 31, 2004: Cash $ 50,000 Accounts Receivable 35,000 Inventory (15 @ $3,000 each) 45,000 Prepaid Insurance 5,000 Security Deposit 1,000 Furniture & Fixtures 110,000 Accumulated Depreciation 20,000 Accounts Payable 12,000 Wages Payable 7,000 Taxes Payable 5,000

How do you complete a medical and history interview with a patient exhibiting signs of dementia or Alzheimers?

For the following problem, Excel Solver must be used , DO NOT use the graphical approach . ALL work must be shown, including formulas on an excel worksheet . Please highlight answer in yellow to question. The dean of the Western College of Business must plan the schools course offerings for the fall semester. Student demands make it necessary to

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