Find the indicated matrix.Let B = [-1 2 4 -3]. Find -3B.
A. [-3 0 2 -5]
B. [3 2 4 -3]
C. [3 -6 -12 9]
D. [-3 6 12 -9]
Answer: C
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Find the derivative of the function.s = sin 
- cos 
A. - 
cos 
- 
sin 
B. 
cos 
+ 
sin 
C. cos 
+ sin 
D. 
cos 
- 
sin 
Simplify. Be sure to rationalize all denominators. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Solve the problem.The average number of vehicles waiting in line at a toll booth of a super highway is modeled by the function 
, where x is a quantity between 0 and 1 known as the traffic intensity. What happens to the average number of vehicles waiting as traffic intensity increases?
A. The average number of vehicles waiting increases. B. The average number of vehicles waiting decreases at first, but then increases. C. The average number of vehicles waiting remains constant. D. The average number of vehicles waiting decreases.
Factor completely. If the polynomial cannot be factored, say it is prime.15x3 - 14x2 - 8x
A. (3x2 - 4)(5x + 2) B. x(5x - 4)(3x + 2) C. x2(3x - 4)(5x + 2) D. x(3x - 4)(5x + 2)