Solve the problem.The position of a weight attached to a spring is s(t) = -2 cos 7t inches after t seconds. What are the frequency and period of the system?
A. Frequency = 7 cycles per sec, period = 
sec
B. Frequency = 
cycles per sec, period = 
sec
C. Frequency = 
cycles per sec, period = 
sec
D. Frequency = 
cycles per sec, period = 
sec
Answer: C
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Solve the problem. Round rates to the nearest tenth of a percent and dollar amounts to the nearest cent.A jewelry store purchased 80 fashion watches for $2400. If the store sold 40 watches at $60, 32 watches at $54, and the rest at $30, find (a) the total markup, (b) the markup percent on selling price, and (c) the equivalent markup percent on cost.
A. $1968, 45.1%, 82% B. $1968, 82%, 45.1% C. $2400, 55%, 72% D. $4368, 100%, 182%
Find the difference. 0 - (-3)
A. 3 B. 0 C. 6 D. -3
Rewrite the expression with a positive rational exponent. Simplify, if possible.2-2/7 ? 23/7
A. 21/7 B. 2-1/7 C. 27/6 D. 26/7
Use a calculator to approximate the logarithm to four decimal places.log 0.00237
A. -2.6253 B. -6.0449 C. -2.6440 D. -2.6073