Solve the discount problem.Peggy received a $21.80 discount on an office chair that normally sells for $109.00. Find the discount rate.
A. 1%
B. 80%
C. 20%
D. 8%
Answer: C
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Solve the problem.When an object weighing 5 pounds is attached to the lowest point P of a spring that hangs vertically, the spring is extended 6 inches. The 5-pound weight is replaced by a 3-pound weight, and the system is allowed to come to equilibrium. The 3-pound weight is then pulled downward another 15 feet and then released. Find the equation of motion. Neglect friction.
A. y = 15 cos 10.328t B. y = 15 cos 1.826t C. y = 15 cos 106.667t D. y = 15 cos 2.981t
Solve the problem.Sue is going to invest some money at simple interest at the rate of 4%. How long will it take for the investment to double?
A. 300 years B. 12.5 years C. 25 years D. Impossible. Not enough information
Solve the problem.A musician plans to perform 5 selections for a concert. If he can choose from 7 different selections, how many ways can he arrange his program?
A. 35 B. 21 C. 16,807 D. 2520
Verify the identity.1 + sec2 x sin2 x = sec2 x
What will be an ideal response?