The function f is one-to-one. Find its inverse.f(x) = 3x + 6
A. f-1(x) = 
B. f-1(x) = - 
C. f-1(x) = 
D. f(x) = 
Answer: C
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (1, 1, e6) for ln(xz)y + 4y3 = 0.
A. 18
B. - 18
C. 
D. - 
Factor the difference of cubes.8r3 - 27
A. (2r - 9)(4r2 - 6r + 3) B. (2r - 3)(4r2 - 9) C. (2r + 3)(4r2 - 6r + 9) D. (2r - 3)(4r2 + 6r + 9)
Solve the problem.From a point on a straight road, two cars are driven in opposite directions, one at 25 miles per hour and the other at 39 miles per hour. In how many hours will they be 320 miles apart?
A. 4 hours B. Not enough information C. 6 hours D. 5 hours
Solve.If an earthquake measured 8.3 on the Richter scale, what was the intensity of the earthquake in terms of I0? The magnitude on the Richter scale of an earthquake of intensity I is 
A. 4020? I0 B. 199,526,231 ? I0 C. 19,952,623? I0 D. 158,489,319? I0