Simplify by writing with positive exponents. Evaluate if necessary. Assume that all variables represent nonzero real numbers.
A. 
B. - 
C. 
D. 
Answer: A
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Solve the problem.A ball is dropped from a height of 21 m and always rebounds 
of the height of the previous drop. How far does it travel (up and down) before coming to rest?
A. 126 m B. 42 m C. 105 m D. 63 m
Use an identity to find the value of the expression. Do not use a calculator.cos 46° sec 46°
A. cos2 46° B. 1 C. 46 D. 0
Solve the problem.Consider the rational inequality 
> 0. Without doing any work, give the solution set. (Hint: determine the sign of the numerator and denominator.)
A. ? B. (-?, ?) C. (-9, ?) D. (-?, -8)
Determine the intervals on which the function is increasing, decreasing, and constant.
A. Decreasing on (-?, ?) B. Increasing on (-?, ?) C. Increasing on (0, ?); Decreasing on (-?, 0) D. Increasing on (-?, 0); Decreasing on (0, ?)