Solve the problem.The rate of expenditure for maintenance of a particular machine is given by M'(x) = 12x
, where x is time measured in years. Total maintenance costs through the second year are $73. Find the total maintenance function.
A. M(x) = 4(x2 + 5)3/2 - 35
B. M(x) = 12(x2 + 5)3/2 + 61
C. M(x) = 12(x2 + 5)3/2 - 35
D. M(x) = 4(x2 + 5)3/2 + 61
Answer: A
Mathematics
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.
A. 5xy B. 5x7y8 C. 5x5y7 D. 5x2y3
Mathematics
Rewrite the expression as a sum or difference, then simplify if possible.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Solve the problem.Suppose a cost-benefit model is given by 
where y is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost for removing 60% of the pollutant.
A. $8 thousands B. $2 thousands C. $9.2 thousands D. $79.5 thousands
Mathematics
Round the following to the nearest ten, nearest hundred, and nearest thousand.7268
A.
| Ten | 7260 |
| Hundred | 7200 |
| Thousand | 8000 |
B.
| Ten | 7260 |
| Hundred | 7300 |
| Thousand | 7000 |
C.
| Ten | 7270 |
| Hundred | 7200 |
| Thousand | 7000 |
D.
| Ten | 7270 |
| Hundred | 7300 |
| Thousand | 7000 |
Mathematics