Use a half-angle formula to find the exact value of the expression.cos 
A. - 
B. - 
C. 
D. 
Answer: C
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In how many ways can we select a committee of two men and two women from a group composed of five men and three women? ?
A. 30 B. 28 C. 14 D. 39
Find the equation of the regression line for the given data. Then use this equation to make the indicated estimate. Round decimals in the regression equation to three decimal places. Round estimates to three decimal places.The following data gives the temperature t (in °F) on randomly chosen days and the height h (in mm) that a certain type of plant grew. Find the equation of the regression line, and then estimate the growth of a plant if the temperature is 77°F.
A. h = 14.569t + 0.211, 1122.024 mm B. h = 53.999t + 0.181, 4158.104 mm C. h = 0.181t + 53.999, 67.936 mm D. h = 0.211t + 14.569, 30.816 mm
Use the limit comparison test to determine if the series converges or diverges.
A. Converges B. Diverges
Solve.Mike filled his car's gas tank and noted that the odometer read 17,305.7. After the next filling, the odometer read 18,053.0. It took 23.5 gal to fill the tank. How many miles per gallon did the car get?
A. 32.8 mpg B. 31.1 mpg C. 31.8 mpg D. 32.1 mpg