Solve the problem.The formula 
models the safe maximum speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature, r, in feet. A highway crew measures the radius of curvature at an exit ramp as 160 feet. What is the maximum safe speed?
A. 17 miles per hour
B. 16 miles per hour
C. 25 miles per hour
D. 20 miles per hour
Answer: D
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 8csc x, y = 0, x = 
, x = 
A. 64? B. 128? C. 16? D. 192?
Divide.
A. 
B. x + 9 - 
C. x + 9 + 
D. x + 10
The number of Americans aged 45 to 54 (which stood at 25 million at the beginning of 1990) grew at the rate of
?
?
million people/year, 
years from the beginning of 1990. How many Americans aged 45 to 54 were added to the population between 1990 and the year 1999? Give your answer to one decimal place.
?
A. 28.0 million
B. 26.5 million
C. 27.7 million
D. 28.5 million
Refer to this figure to answer the question. Assume 
and 
are parallel.
Are ?CDA and ?DHI supplementary?
A. No B. Yes