Factor completely.y2 - 81
A. (y - 9)(y - 9)
B. (y + 81)(y - 81)
C. (y2 + 9)(y2 - 9)
D. (y + 9)(y - 9)
Answer: D
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A. Number of children for women in Kenya B. Number of children for women in Portland, Oregon C. Number of children for women in India D. Number of children for women in Haiti
Find the eccentricity of the hyperbola.y2 - 144x2 = 144
A. 
B. 
C. 
D. 
Estimate the answer by rounding as indicated.Estimate by rounding to the nearest hundred.
A. 183 B. 1300 C. 100 D. 200
Solve the problem.The formula v = 
can be used to estimate the maximum safe velocity v, in miles per hour, at which a car can travel along a curved road with a radius of curvature r, in feet. To the nearest whole number, find the maximum safe speed for a curve in a road with a radius of curvature of 350 feet.
A. 19 mph B. 47 mph C. 30 mph D. 12 mph