CURRENCY The average exchange rate from Euros to U. S. dollars for a recent four-month period can be described
by f(x) = 0.66x, where x is the currency value in
Euros. (Example 5)
a. Explain why the inverse function f-1(x) exists. Then
find f-1(x).
b. What do f-1(x) and x represent in the inverse function?
c. What restrictions, if any, should be placed on the
domains of f(x) and f-1(x)? Explain.
d. What is the value in Euros of 100 U. S. dollars?

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.