Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 
A. f-1(x) = x2 + 7, x ? 0
B. f-1(x) = (x - 7)2
C. Not one-to-one
D. f-1(x) = 
Answer: A
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Solve the problem using the rule of 78.A fisherman buys a new boat for $50,000. He makes a down payment of $17,000 and finances the balance at 8.5% APR over 60 months. Before making the 47th payment, the fisherman decides to pay the remaining balance on the loan. How much interest will the fisherman save?
A. $335.93 B. $574.34 C. $352.53 D. $379.07
Draw a sketch to illustrate the fraction.
of an object
A. 
B. 
C. 
D. 
Verify the identity.
= 1 - tan y cot x
What will be an ideal response?
Find all solutions to the equation. Express the solution in degrees.
csc x + 2 = 0
A. 240° + 360°n or 300° + 360°n B. 120° + 360°n or 300° + 360°n C. 60° + 360°n or 240° + 360°n D. 60° + 360°n or 120° + 360°n