Hor School blem S 31:lesson Ouir 3.1.PS-10 Que The Stock Market Nadia is a stockbroker. She earns 12% commission each week. Last week, she sold $4,500 worth of stocks. How much did she make last week in commission? If she averages that same amount each week, how much did she make in commission in 2011? Last week, she made $ in commission.

Hor School blem S 31:lesson Ouir 3.1.PS-10 Que The Stock Market Nadia is a stockbroker. She earns 12% commission each week. Last week, she sold $4,500 worth of stocks. How much did she make last week in commission? If she averages that same amount each week, how much did she make in commission in 2011? Last week, she made $ in commission.

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Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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In 1975, the automobile industry determined t hat 40% of American carowners drove large cars, 20% drove intermediate-sized cars, and 40% drove small cars. A second survey in 1985 showed that 70% of the large-car owners in 1975 still owned large cars in 19 5, but 30% had changed to an intermediate-sized car. Of those who owned intermediate-sizedcars in 1975, 10% had switched to large cars, 70% cont inued to driveintermediate-sized cars, and 20% had changed to small cars in 19 5.Finally, of the small-car owners in 1975, 10% owned intermediate-sizedcars and 90% owned small cars in 19 5. Assuming that these trendscontinue, determine the percentages of Americans who own cars of eachsize in 1995 and the corresponding eventual percentages.
In a recent study, 50males used a new weight-loss supplement, and 38 of them experienced weight loss after two weeks. In the same study, 20 females used the same supplement, and 16of them experienced weight loss after two weeks.Fill in t he blanks below to make the most reasonable statement possible. The new weight-loss supplement was less effective on ▼(Choose one: males/females) in the study. That is because only ____% of them lost weight after two weeks, whereas ____% of the ▼(Choose one:males/females) lost weight after two weeks.
The Reviews editor for a certain scientific journal decides whether the reviewfor any particular book should be short (1–2 pages), medium (3–4 pages), or long(5–6 pages). Data on recent reviews indicates that 45% of them are short, 35%are medium, and the other 20% are long. Reviews are submitted in either Wordor LaTeX. For short reviews, 70% are in Word, whereas 55% of medium reviewsare in Word and 40% of long reviews are in Word. Suppose a recent review israndomly selected.(a) What is the probability that the selected review was submitted in LaTeX for-mat? (b) If the selected review was submitted in Word format, what are the posteriorprobabilities of it being short, medium, or long?
The KLM Christmas tree Farm owns a plot of land with 5000 evergreen trees.Each year KLM allows retailers of Christmas trees to select and cut trees for sale to individualcustomers. KLM protects small trees (usually less than 4 feet tall) so that they will be availablefor sale in future years. Currently, 1500 trees are classified as protected trees, while theremaining 3500 are available for cutting. However, even though a tree is available for cuttingin a given year, it may not be selected for cutting until future years. Most trees not cut in agiven year live until the next year, but some diseased trees are lost every year. In viewing the KLM Christmas tree operation as a Markov process with yearly periods, we define thefollowing four states:
Suppose that you interview 100 exiting voters about who they voted for governor. Of the 100 voters, 55 reported that they voted for the democratic candidate. Is there sufficient evidence to suggest that the democratic candidate will win the election (gets at least 50% of votes) at the .01 level? Select one: a. T=1, there is evidence that the candidate will win. b. Z=1, there is evidence that the candidate will win. c. Z=1, there is no evidence that the candidate will win. d. T=1, there is no evidence that the candidate will win.
The market research department at a manufacturing plant determines that 30% of the people who purchase the plant's product during any month will not purchase it the next month. On the other hand, 40% of the people who do no purchase the product during any month will purchase it the next month. In a population of 1000 people, 200 people purchased the product this month. How many will purchase the product the next month and in 2 months.
Among the adult population of a certain town 50 per cent are males. 60 per cent are wage earners and 50 per cent are., 45 years of-age or over, 10 per cent of the males are not wage-earners and 40'per cent Of the males are u1ll/er 45. Make the best possible inferenc~ about the limits within which the percentage of persons (male or female) of 45 years or over are wage- earners.
Figures obtained from a city's police department seem to indicate that of all motor vehicles reported as stolen, 63% were stolen by professionals (P), whereas 37% were stolen by amateurs (primarily for joy rides) (A). Of the vehicles presumed stolen by professionals, 25% were recovered within 48 hours (R<48), 23% were recovered after 48 hours (R>48), and 52% were never recovered (N). Of the vehicles presumed stolen by amateurs, 33% were recovered within 48 hours, 63% were recovered after 48 hours, and 4% were never recovered. (b) What is the probability that a vehicle stolen by a professional in this city will be recovered within 48 hours?(c) What is the probability that a vehicle stolen in this city will never be recovered? (Round your answer to four decimal places.)
A university engineering department has introduced a new software package called SOLVIT. To save money, the university’s purchasing department has negotiated a bargain price for a 4 user license that allows only 4 students to use SOLVIT at any one time. It is estimated that thsi should allow 90% of students to use the package when they need it. The student's union has asked for more licenses to be bought since engineering students report having to queue excessively to use SOLVIT. As a result the computer Centre monitors the use of the software. Their findings show that on average 20 students are logged on at peak times and 4 of these want to use SOLVIT. Was the purchasing department estimate correct? Answer this by yes or no and show your proof why you choose yes or no.
Consider a screening system that analyzes the luggage that is being loadedto a plane. Each package first goes through a screening device. If it passes the test there, then it is loaded to the plane. If it does not, the package goes to a second screening device. The procedure is similar for the second device: if the luggage passes the test, it is loaded to the plane, if it fails, it issent to a third device. Packages that passes the test at third device are loladed to the plane, the ones that fail are taken paprt and not loaded to the plane.The screening devices i = 1; 2; 3 are not perfect. For each device, there are two risks:– With probability pi, each device erroneously passes a bag that is dangerous, given that previous devices have correctly rejected the bag.– With probability qi, each device erroneously fails a harmless bag that previous devices have also erroneously failed.Assume that pi; qi > 0 What is the probability that a dangerous package will be loaded to the aircraft?…
We wish to demonstrate that the average time to graduate from school is afected by the students who have taken AP calculus in hgh school. Specially, we wish to demonstrate the students who have taken AP calculus in high school graduate an average of more than .25 years sooner than students who have not taken AP calculus in high school. If we let μ1 denote the average time to graduate for students who have not taken AP calculus and μ2 dentoe the average time to graduate for students who have taken AP calculus, what is the apropriate null hypothesis
Suppose a company charges a premium of $150 per year for an insurance policy for storm damage to roofs. Actuarial studies show that in case of a storm, the insurance company will pay out an average of $8000 for damage to a composition shingle roof and an average of $12,000 for damage to a shake roof. They also determine that out of every 10,000 policies, there are 7 claims per year made on composition shingle roofs and 11 claims per year made on shake roofs. What is the company’s expected value (i.e., expected profit) per year of a storm insurance policy? What annual profit can the company expect if it issues 1000 such policies? Determine the probability of a composition shingle roof claim out of 10,000 = ______ Determine the probability of a shake roof claim out of 10,000 = ______ How many claims are made out of 10,000? = _______ What is the probability of no claims out of 10,000? = _______ How much does each shingle roof claim cost the company, don’t forget each person pays $150…