Find the maximum y-value on the graph of y = f(x).f(x) = 4x - x2
A. 4
B. 2
C. -2
D. -4
Answer: A
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An initial investment of $545.45 declines at a rate of 5 percent per year. What is the value of the investment after 3 years? Round your answer to the nearest cent. ? ?
A. $572.72 B. $81.82 C. $467.66 D. None of the above
Provide an appropriate response.The time it takes a boat to travel a given distance downstream (with the current) can be calculated by dividing the distance by the sum of the speed of the boat and the speed of the current. Write an equation which calculates the time t it takes a boat moving at a speed r against a current c to travel a distance d. Solve your equation for r.
What will be an ideal response?
Determine if the statement is a proportion.I. 
II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
Find the inverse of the function represented by the set of ordered pairs.f: {(7, -3), (-7, 3), (7, 5), (-7, -5)}
A. f-1: {(-3, 7), (3, -7), (5, 7), (-5, -7)} B. f-1: {(-3, 7), (7, -7), (5, 7), (-5, -7)} C. f-1: {(-3, 7), (3, -7), (5, -7), (-5, -7)} D. Not invertible