Use the fundamental identities to simplify the expression.1 - sin2 ?
A. - cos2 ?
B. cos ?
C. cos2 ?
D. cot2 ?
Answer: C
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Use an equation to solve the problem.A sport jacket that sells for $180 has a markup of $105. Find the wholesale price.
A. $95 B. $70 C. $60 D. $75 E. $65
Solve the problem.Jill is 14 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2 kilometers per hour. They meet in 4 hours. How fast is Joe walking?
A. 1.5 kilometers per hour B. 2 kilometers per hour C. 3.5 kilometers per hour D. 2.5 kilometers per hour
Find f(x) and g(x) such that h(x) = (f ? g)(x). Answers may vary.h(x) = 
A. f(x) = 
, g(x) = 
B. f(x) = 
, g(x) = -78x2 + 35
C. f(x) = -78x2 + 35, g(x) = 
D. f(x) = 
, g(x) = x
Solve the problem.The number of mosquitoes M(x), in millions, in a certain area depends on the June rainfall x, in inches, according to the formula 
What rainfall produces the maximum number of mosquitoes?
A. 144 in. B. 0 in. C. 12 in. D. 6 in.