Solve. If necessary, round answers to the nearest hundredth.The following test scores were recorded for a student: 83, 78, 76, 72, 78, 64, 74. Find the mean, median, and mode.
A.
| mean: 76 | median: 72 | mode: 78 |
B.
| mean: 75 | median: 72 | mode: 83 |
C.
| mean: 76 | median: 75 | mode: 83 |
D.
| mean: 75 | median: 76 | mode: 78 |
Answer: D
Mathematics
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 3 cos t + cos 3t, y = 3 sin t - sin 3t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Suppose the government wants to impose a tax on fossil fuels to reduce carbon emissions. The cost benefit is modeled by 
where x represents the dollars of tax per ton of carbon emitted and P represents the percent reduction in emissions of carbon. (P is in decimal form.) Determine P when 
Round to three decimal places.
A. -0.177 B. 0.182 C. -0.13 D. 1.818
Mathematics
Simplify the expression.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Find the sum of the arithmetic series using a formula.-11 + (-9) + (-7) + ... + 47 + 49
A. 627 B. 551 C. 589 D. 570
Mathematics