If n is an integer, n ? 180° represents an integer multiple of 180°, and 
represents an odd integer multiple of 90°. Decide whether the expression is equal to 0, 1, -1, or is undefined. tan((2n + 1) ? 90°)
A. Undefined
B. -1
C. 1
D. 0
Answer: A
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Convert the units using unit fractions.12,000 lb = 
tons
A. 6
B. 7
C. 5
D. 6
Find the range of the quadratic function in interval notation.f(x) = -(x + 3)2 + 7
A. (-?, 7] B. (-?, 3] C. [-3, ?) D. [7, ?)
Find the vertex and axis of symmetry of the graph of the function.f(x) = -5x2 - 2x - 2
A. 
; x = 
B. 
; x = -5
C. 
; x = - 
D. (5, -2); x = 5
Solve the problem.The function f(x) = 1 + 1.6 ln (x+1) models the average number of free-throws a basketball player can make consecutively during practice as a function of time, where x is the number of consecutive days the basketball player has practiced for two hours. After 147 days of practice, what is the average number of consecutive free throws the basketball player makes?
A. 13 consecutive free throws B. 9 consecutive free throws C. 12 consecutive free throws D. 10 consecutive free throws