The number P of British pounds you can get from a bank is a linear function of the number D of American dollars you pay. An American tourist arriving at Heathrow airport in England went to a banking window at the airport and gave the teller 83 American dollars. She received 31 British pounds in exchange. In this exercise, assume there is no service charge for exchanging currency. (a) What is the rate of change, or slope, of P with respect to D? (Note: You need two values to calculate slope, but you were given only one. If you think about it, you know the other value. How many British pounds can you get for zero American dollars? Round your answer to five decimal places.) ___ pounds per dollar Explain in practical terms what this number means. This means each dollar is worth pound. (b) A few days later, the American tourist went to a bank in Plymouth and exchanged 130 American dollars for British pounds. How many pounds did she receive? (Round your answer to two decimal places.) £ _ (c) Upon returning to the airport, she found that she still had £12.52 in British currency in her purse. In preparation for the trip home, she exchanged that for American dollars. How much money, in American dollars, did she get? (Round your answer to two decimal places.) $ ______

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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The number P of British pounds you can get from a bank is a linear function of the number D of American dollars you pay. An American tourist arriving at Heathrow airport in England went to a banking window at the airport and gave the teller 83 American dollars. She received 31 British pounds in exchange. In this exercise, assume there is no service charge for exchanging currency.

(a) What is the rate of change, or slope, of P with respect to D? (Note: You need two values to calculate slope, but you were given only one. If you think about it, you know the other value. How many British pounds can you get for zero American dollars? Round your answer to five decimal places.)
_______ pounds per dollar

Explain in practical terms what this number means.

This means each dollar is worth ________ pound.

(b) A few days later, the American tourist went to a bank in Plymouth and exchanged 130 American dollars for British pounds. How many pounds did she receive? (Round your answer to two decimal places.)
£ _______

(c) Upon returning to the airport, she found that she still had £12.52 in British currency in her purse. In preparation for the trip home, she exchanged that for American dollars. How much money, in American dollars, did she get? (Round your answer to two decimal places.)
$ ________

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