Solve the problem.Which of the following [A), B), C), or D)] can be a negative number?
A. the variance of a data set
B. the range of a data set
C. the standard deviation of a data set
D. the interquartile range of a data set
E. none of these can be negative numbers.
Answer: E
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Determine where the function is increasing and where it is decreasing.f(x) = -x2 + 4x + 5
A. increasing on (2, ?) decreasing on (-?, 2) B. increasing on (-?, 2) decreasing on (2, ?) C. increasing on (-?, 9) decreasing on (9, ?) D. increasing on (9, ?) decreasing on (-?, 9)
Write an equation for a function whose graph fits the given description.The graph of f(x) = 
is shifted 6 units to the left and then shifted 7 units upward.
A. f(x) = 
+ 6
B. f(x) = 7
C. f(x) = 
+ 7
D. f(x) = 
+ 7
Perform the indicated operations and simplify. Assume all variables represent positive real numbers.
+ 9
+ 2
A. -83
B. -72
C. 83
D. 6
Evaluate the exponential expression. Write the answer as an improper fraction where appropriate.
3
A. 
B. - 
C. 
D. - 