Solve the problem. Round rates to the nearest tenth of a percent and dollar amounts to the nearest dollar when necessary.An office supply store sells a computer disk for $87.95. If the cost is $60.67, find the percent of markup on cost and the equivalent percent of markup on selling price.
A. 69%, 145%
B. 45%, 69%
C. 45%, 31%
D. 69%, 31%
Answer: C
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Determine whether the lines are parallel, perpendicular, or neither. 9x + 3y = 12 and 24x + 8y = 34
A. Perpendicular B. Neither C. Parallel
Find the derivative of the function at the given value of x using a graphing utility. If necessary, round to four decimal places.f(x) = x sin(8x); x = 9
A. -69.6336 B. 2284.3294 C. -69.3875 D. -2284.3294
Sketch the curves without any technological help.
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A. ?
B. ?
C. ?
D. ?
E. ?
Solve.In recent years, many states have passed laws against smoking in public buildings. The total number of states N that have passed a no smoking in public buildings law, t years after 1987 is given by the functionN(t) = 
How many states had passed the law in 1987? Round to the nearest whole number.
A. 0 B. 4 C. 3 D. 1