Determine if the equation is an identity.cos(A + B) - cos(A - B) = - 2 sin A sin B
A. Yes
B. No
Answer: A
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Solve the problem.For the study described below, identify the sample statistic.A bank manager wants to know the average amount of time customers of his bank have to wait in line. 300 customers were polled and asked their average wait time at the bank.
A. The percentage of dissatisfied customers among all of the bank's customers. B. The average wait time for all of the bank's customers C. The 300 people polled D. The average wait time for the 300 customers polled
Choose the most reasonable unit of measure.Basketball court length: 25 
(mm, cm, m, km)
A. cm B. km C. m D. mm
Evaluate the expression using the given values.vt + 
at2; v = 31, t = 1.2, a = -12.5
A. 28.2 B. 28 C. 29.4 D. 28.4
Use a graphing calculator to find the value of the determinant.
A. 22 B. -22 C. 142 D. -2