Solve the problem.The rate of expenditure on a particular machine is given by 
where x is time measured in years. Maintenance costs through the second year are $96. Find the total maintenance function.
A. M(x) = 5(x2 + 5)3/2 - 39
B. M(x) = 15(x2 + 5)3/2 + 81
C. M(x) = 15(x2 + 5)3/2 - 39
D. M(x) = 5(x2 + 5)3/2 + 81
Answer: A
Mathematics
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Find the gradient field F of the function f.f(x, y, z) = ln
+ z4
A. F = 
i + 
j + 
k
B. F = 
i + 
j + 
k
C. F = 
i + 
j + 
k
D. F = 
i + 
j + 
k
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Express the number in scientific notation.4,0,000,000,000
A. 4 × 109 B. 4 × 1012 C. 4 × 10-9 D. 4 × 10-12
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Write as the sum and/or difference of logarithms. Express powers as factors. log10
A. 
log10m + 
log10n - 
log10k
B. 
log10m + 
log10n - 2log10k
C. 
log10m ? 
log10n ÷ 2log10k
D. 7log10m + 9log10n - 2log10k
Mathematics
Express the statement as an equation involving the indicated variables.The area A of a triangle is one-half the product of its base b and its height h.
A. A = 2bh
B. A = 
(b + h)
C. A = bh
D. A = 
bh
Mathematics