Solve the problem using your calculator.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Use linear regression to find a linear function that predicts the number of products sold as a function of the cost of advertising.
A. y = -26.4 - 1.42x
B. y = 55.8 - 2.79x
C. y = 26.4 + 1.42x
D. y = 55.8 + 2.79x
Answer: D
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Solve the problem.The velocity v (in m/s) of an object moving with acceleration a (in m/s2) is given by 
where t is the time (in seconds). Find a formula for v, if a = 
t(t2 + 1)4.
A. v = 
(t2 + 1)5 + C
B. v = - 
(t2 + 1)5 + C
C. v = 
(t2 + 1)5 + C
D. v = 
(t2 + 1)5 + C
Solve the problem.Use the graphs to find the value of (f - g)(-1).
A. 1 B. 3 C. -1 D. 0
Solve the problem. Give the answer to the nearest thousandth if necessary.The diagram below shows a rope connecting the top of a pole to the ground. The rope is 16 yd long and touches the ground 13 yd from the pole. How tall is the pole? 
A. 9.327 yd B. 14.5 yd C. 43.5 yd D. 4.664 yd
Find the exact value of the integral using formulas from geometry.
dx
A. 8? B. 64? C. 32? D. 16?