Solve the problem.On the day when Julie left for her vacation, the function that converted U.S. dollars to British pounds was f(x) = 0.54521x, where x is the number of U.S. dollars and f(x) is the number of British pounds. Find the inverse function.
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = x - 0.54521
Answer: A
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Solve the problem.Find the foci and asymptotes of the following hyperbola:9y2 - x2 = 9
A. Foci: (0, 
), (0, -
); Asymptotes: y = 
x, y = - 
x
B. Foci: (0, 10), (0, -10); Asymptotes: y = 3x, y = -3x
C. Foci: (0, 
), (0, -
); Asymptotes: y = 3x, y = -3x
D. Foci: (
, 0), (-
, 0); Asymptotes: y = 
x, y = - 
x
Solve the problem.A new homeowner has a triangular-shaped back yard. Two of the three sides measure 65 ft and 80 ft and form an included angle of 125°. The owner wants to approximate the area of the yard, so that he can determine the amount of fertilizer and grass seed to be purchased. Find the area of the yard rounded to the nearest square foot.
A. 2130 sq. ft B. 4260 sq. ft C. 5200 sq. ft D. 2129 sq. ft
Perform the operation indicated.
+ 
A. 
B. 
C. 
D. 
Evaluate the expression.Let x = -1, y = 4. Evaluate 
.
A. - 
B. 
C. - 
D. - 