Factor the special product.49x2 - 64
A. (49x + 1)(x - 64)
B. (7x + 8)2
C. (7x + 8)(7x - 8)
D. (7x - 8)2
Answer: C
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Graph the function.The voltage e for an alternating-current circuit is given by 
. Sketch two cycles of the voltage as a function of time. Label the point on the horizontal axis which represents the end of the second cycle.
A. 
B. 
C. 
D. 
Find the absolute value.
A. ±2.2 B. -2.2 C. 0 D. 2.2
Solve the problem.If a rock falls from a height of 20 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 20 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 2.02 sec B. 4.08 sec C. 0.83 sec D. 0.91 sec
Solve the problem.Which of the following polynomial functions might have the graph shown in the illustration below?
A. f(x) = x(x - 2)2(x - 1) B. f(x) = x2(x - 2)2(x - 1)2 C. f(x) = x2(x - 2)(x - 1) D. f(x) = x(x - 2)(x - 1)2