Solve.Amy can clean the house in 9 hours. When she works together with Tom, the job takes 5 hours. How long would it take Tom, working by himself, to clean the house?
A. 12
hr
B. 4 hr
C. 11
hr
D. 11
hr
Answer: C
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Solve the exponential equation. Round to three decimal places when necessary.e-t = 0.06
A. 2.613 B. -2.813 C. 2.913 D. 2.813
Solve the inequality.16 - x2 ? 0
A. x ? -4 B. x ? -4 or x ? 4 C. x ? 4 D. -4 < x < 4
Solve the problem.Brandy's Gift House pays employees for each gift they gift wrap. Assume they are paid as follows: 
If Lee wraps 14 gifts, what are her gross earnings?
A. $56.00 B. $64.00 C. $60.00 D. $70.00
Solve the variation problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If the force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?
A. 2 pounds B. 4 pounds C. 1 pound D. 3 pounds