Use the formula d = rt to find the value of the missing variable.d = 198 miles, t = 3 days
A. r = 66 mi/day
B. r = 195 mi/day
C. r = 63 mi/day
D. r = 71 mi/day
Answer: A
Mathematics
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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. -0.14 B. -0.235 C. 0.239 D. 1.761
Mathematics
A single die is rolled twice, and the equally likely 36 outcomes are shown.
Find the probability of two numbers whose sum is greater than 9.
A. 6
B. 
C. 
D. 
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Subtract.0 - 5.13
A. 5.13 B. -5 C. 0 D. -5.13
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Divide. Express your answer in standard form.
A. 
+ 
i
B. - 
+ 
i
C. 
- 
i
D. - 
- 
i
Mathematics