Solve the problem.Jill is 18 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2 kilometers per hour. They meet in 4 hours. How fast is Joe walking?
A. 2.25 kilometers per hour
B. 2.5 kilometers per hour
C. 10 kilometers per hour
D. 6.5 kilometers per hour
Answer: B
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Find the surface area of the surface S.S is the paraboloid x2 + y2 - z = 0 between the planes z = 
and z = 6.
A. 
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B. 
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C. 
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D. 
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Find the length of the third side of the right triangle. Assume that c represents the length of the hypotenuse. Give an exact answer and, if appropriate, an approximation to three decimal places.b = 12, c = 15
A. a = 9 B. a = 10 C. a = 81 D. a = 3
Find the indicated sum.3 + 6 + 9 + . . . + 120
A. 4920 B. 2460 C. 4797 D. 2398
Let 
. Sketch the region R under the graph of f on the interval [0, 3], and use a Riemann sum with five subintervals of equal length 
to approximate the area of R. Choose the
representative points to be the right endpoints of the subintervals.
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A. ?
Area approximation with a Riemann sum with five subintervals is 9 sq units.
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B. ?
Area approximation with a Riemann sum with five subintervals is 8.1 sq units.
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C. ?
Area approximation with a Riemann sum with five subintervals is 7.2 sq units.
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D. ?
Area approximation with a Riemann sum with five subintervals is 10.8 sq units.
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