Solve.
= 7
A. -24
B. 12
C. 24
D. 48
Answer: C
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Multiply or divide. Simplify, if necessary.
A. 22 ft 5 in. B. 22 ft 1 in. C. 6 ft 1 in. D. 20 ft 1 in.
Solve the problem.A student is told to work any 7 out of 10 questions on an exam. In how many different ways can he complete the exam? (The correctness of his answers has no bearing.)
A. 10,000,000 B. 120 C. 720 D. 21
Answer the question.If we are looking for the critical points (a,b) on the surface of 
then we study the tangent lines to (a,b) along the slices parallel to the 
and 
These tangent lines must have which of the following properties?(i) They must be perpendicular.(ii) They must be horizontal.(iii) They must be horizontal, but not perpendicular.(iv) They must be perpendicular, but not horizontal.
A. Only (iii) is correct. B. Only (iv) is correct. C. Both (i) and (ii) are correct. D. Only (ii) is correct.
Find the centroid of the region bounded by the curves. 
What will be an ideal response?