Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.
x = 15
A. {-7.50}
B. {-3.91}
C. {3.91}
D. {-0.26}
Answer: B
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Sketch D and g(D) from the description of D and change of variables 
x = u cos v, y = u sin v where D is the rectangle 1 ? u ? 2, 0 ? v ? 
?
A.
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B. None of these.
C.
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D.
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A rectangular box is to have a square base and a volume of 24 ft.3. If the material for the base costs 20 cent/square foot, the material for the sides costs 10 cent/square foot, and the material for the top costs 40 cent/square foot, determine the dimensions of the box that can be constructed at minimum cost.
?
?
What will be an ideal response?
Determine whether the pair of lines is parallel, perpendicular, or neither.y = -5x - 7 and y = 5x + 9
A. neither B. perpendicular C. parallel
Solve the problem.The voltage E in an electrical circuit is given by E = 1.6 cos 100?t, where t is time measured in seconds. Find the period.
A. 
B. 50
C. 50?
D. 