Determine whether the equation defines y as a function of x. y = 
A. function
B. not a function
Answer: A
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Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 6 ft/sec away from a lamppost that is 24 ft high. At what rate is the length of his shadow changing when he is 75 ft away from the lamppost? (Do not round your answer)
A. 
ft/sec
B. 75 ft/sec
C. 
ft/sec
D. 2 ft/sec
Find the derivative of y with respect to x.y = sin-1 
A. 
B. 
C. - 
D. 
Solve the problem.A boat moves 6 kilometers upstream in the same amount of time it moves 20 kilometers downstream. If the rate of the current is 5 kilometers per hour, find the rate of the boat in still water.
A. 2
kilometers per hour
B. 5 kilometers per hour
C. 9
kilometers per hour
D. 8
kilometers per hour
Factor completely. If unfactorable, indicate that the polynomial is prime.(a + b)x2 - 5(a + b)x - 24(a + b)
A. (ax + 3b)(ax - 8b) B. prime C. (a +b)(x - 3)(x + 8) D. (a + b)(x + 3)(x - 8)