Find the vertices of the hyperbola with the given equation.
- 
= 1
A. (-11, 0), (11, 0)
B. (-1, 0), (1, 0)
C. (0, -1), (0, 1)
D. (0, -11), (0, 11)
Answer: C
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Solve the problem.The function 
can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams will be present after 
Round the answer to two decimal places.
A. 607.55 mg B. 0.04 mg C. 2.97 mg D. 1.62 mg
Graph the function. Give the domain and range.f(x) = 
A. Domain: (-?, ?); Range: [5, ?)
B. Domain: (-?, ?); Range: [-5, ?)
C. Domain: (-?, ?); Range: [0, ?)
D. Domain: (-?, ?); Range: [0, ?)
Perform the indicated operations and simplify the result so there are no quotients.2 tan ? - (1 + tan ?)2
A. - sec2? B. 1 - sin ? C. 0 D. 1
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