Evaluate the improper integral.
A. 18 ln12 - 9
B. 18 ln2 - 9
C. - 
ln12 + 9
D. 18 ln12 - 18
Answer: A
Mathematics
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A.
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Calculate the arc length of the indicated portion of the curve r(t).r(t) = (9 - 2t)i + (5 + 9t)j + (6t - 9)k, -3 ? t ? 5
A. 242 B. 22 C. 88 D. 968
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Solve the problem.The area A of a rectangle is 
If the width W of the rectangle is 3z + 4, find the length L of the rectangle.
A. 5z + 2
B. 5z - 2
C. 15z - 2 - 
D. 5z - 2 + 
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The function f is one-to-one. Find its inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
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