15. Rahj owns a hardware store. For every increase of 10¢ in the priceA of a package of batteries, he estimates that sales decrease by10 packages per day. The store normally sells 700 packages of batteriesper day, at $5.00 per package.a) Determine an equation for the revenue, y, when x packages ofbatteries are sold.b)What is the maximum daily revenue that Rahj can expect frombattery sales?c) How many packages of batteries are sold when the revenue is ata maximum?

As per the question, we are asked to analyze the relationship between the price and sales of battery…

Answered: Rahj owns a hardware store. For every…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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8. Egg production in the United States was 12936.8 million pounds in 2016 up from 9074.4 million pounds in 1996. Assume that the increase is linear. Write a formula for the situation. round values to thousandths. Define variables as Y = Years since 1996and E = Eggs in ? of pounds a. Formula: b. Use your formula and algebra to complete the sentence: The number of eggs produced will surpass 14000 million in the year
Angelina already had $1500 saved before she started. She isn't working while she's in school, so she can only save $250 a year each year she is in college. Ray didn't have any money saved before he started, but he has a part-time job. He figures that he can save about $750 a year each year that he is in college. Let x represent the number of years the two students are in college. Assume that this is the same number of years for both. Let y represent the total amount of savings in dollars after x years. What is the equation that represents Angelina’s savings for college? What is the equation that represents Ray’s savings for college? When will Angelina and Ray have the same amount saved for college? Explain how you know. After the first two years, who has the most saved? Explain how you know.
Joan Nguyen recently claimed that the proportion of college-aged males with at least one pierced ear is as high as the proportion of college- aged females. She conducted a survey in her classes. Out of 112 males, 19 had at least one pierced ear. Out of 98 females, 46 had at least one pierced ear. Do you believe that the proportion of males with at least one pierced ear is different from the proportion of females with at least one pierced ear? (Use a = 0.05.) NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) Part (a) Part (b) Part (c) Part (d) State the distribution to use for the test. (Round your answers to four decimal places.) Pm-P-? O Part (e) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the distribution round your answer to three decimal…
The cost (C) of computer monitor is partly constant and partly varies directly as the number of computer monitor (N) produced. The cost is $2000 when 5 computer monitors produced. The cost is $2600 when 7 computer monitors produced. (a) Find the cost (C) in terms of the number of computer monitors (N). (b) Find the cost (C) when 10 computer monitors produced. (c) Find the number of computer monitors (N) produced when the cost is $6500.
In Pali Alto, California, a government agency ordered computer-related companies to contribute to a pool of money to clean up underground water supplies. (The companies had stored toxic chemicals in leaking underground containers.) the formula C=2x/100-x models the cost, in millions of dollars, for removing x percent of the contaminants. a) what percentage of the contaminants can be removed for $2 million? b) what percentage of the contaminants can be removed for $8 millions? c it is possible to remove all of the contaminants? Explain the reasoning behind your answer.
A rising 3rd year college students has 60 credits and a cumulative GPA of 2.88. This semester he is taking 15 credits and hopes to raise his GPA to 3.20 and make the Dean’s list. Assume the maximum grade point equivalent that can be awarded is 4.0.
The death rate per 100,000 for lung cancer is 7 among nonsmokers and 71 among smokers. The prevalence of smoking in the population is 55%. Calculate the relative risk of dying from lung cancer for a smoker compared to a nonsmoker. Round to the tenth decimal place.
The profit, P, on a $2 muffin is 75%. At least 100 muffins must be sold in a day. The expression for the minimum daily profit, P, is Select one: O O a. P> $150 b. P> $100 c. P> $150 d. P = $150
Tyler’s walking rate is 5 yards per one second. Write an equation that utilizes Tyler’s walking rate, representing the relationship between distance traveled (d) and time (t).
The number of cats in Eugene is increasing at a constant rate. Four weeks ago, the number of cats was 48,000. Today, it is 50,000. a.)Write an equation for the number of cats in Eugene as a function of the number of days from today. B.)When will there be 61,000 cats in Eugene?

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