Find the composite function for the given functions and state the domain. f ? g for f(x) = x2 - 16 and g(x) = 
A. x - 16, for x ? 0
B. 
, for (-?, -4] ? [4, ?)
C. 
- 16, for all x
D. x - 4, for x ? 0
Answer: A
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Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The number of video stores in a region recently decreased from 113 to 69. Find the percent of decrease.
A. 63.8% B. 38.9% C. 61.1% D. 156.8%
The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (7t - 4t3)i + 2tan(3t)j + e5tk
A. a
= - 2?i + 72j + 25e5/12?k
B. a
= - 2?i - 72j + 25e5/12?k
C. a
= - 2?i - 72j + 25k
D. a
= 2?i + 72j + 25e5/12?k
Find the perimeter of (the distance around) the figure.
A. 338 in. B. 74 in. C. 338 ft D. 206 in.
Simplify the expression by combining like terms. -5.51x + (-0.74x)
A. -6.25x B. 6.25x C. 4.77x D. -4.77x