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?

the answer to this question is in the pic

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

the square root of what number? if you add that, then someone will probably answer the question.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: