Perform the matrix operation.Let B = 
. Find -3B.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.A coin is tossed upward from a balcony 
high with an initial velocity of 
During what interval of time will the coin be at a height of at least 
(h = -16t2 + v0t + h0.)
A. 2 ? t ? 3 B. 0 ? t ? 3 C. 3 ? t ? 6 D. 0 ? t ? 1
Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve.
?
?
A. 
B. 
C. 
D. 
E. 
Factor the trinomial completely.
A. 
B. 
C. 
D. 
E. not factorable
A time study was conducted to determine the length of time required to perform a task in a manufacturing process. The times required by approximately two-thirds of the workers in the study satisfied the inequality 
where t is the time in minutes. What are the maximum and minimum times? Round your answer to one decimal place.
A. minimum time is 
minutes, maximum time is 
minutes
B. minimum time is 
minutes, maximum time is 
minutes
C. minimum time is 
minutes, maximum time is 
minutes
D. minimum time is 
minutes, maximum time is 
minutes
E. minimum time is 
minutes, maximum time is 
minutes