Find the derivative.y = cos(cos 2t)
A. -4 cos 2t sin 2t
B. -2 sin (cos 2t)
C. sin (cos 2t)
D. 2 sin 2t sin (cos 2t)
Answer: D
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Solve the problem.A yard in the shape of a square measures 
on each side. A triangular area with a height of 
and a base of 
is dug up for a flower bed. How much yard area is left over?
A. 161.5 ft2 B. 342 ft2 C. 323 ft2 D. 380 ft2
Solve the given equation by finding the unknown value.15 - ? = 12
A. 1 B. 15 C. 9 D. 3
A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 75%. Refer to Exhibit 9-6. At a .05 level of significance, it can be concluded that the proportion of the population in favor of candidate A is
A. significantly greater than 75% B. not significantly greater than 75 C. 96 significantly greater than 80% D. not significantly greater than 80%
Solve the problem.If the formula R = -0.037t + 50.1 can be used to predict the world record in the 
eter dash 
after 1925, for what years will the world records be 48.3 seconds or less?
A. 1973 or after B. 1975 or after C. 1949 or after D. 1974 or after