Solve the problem.A circular swimming pool, 20 feet in diameter, is enclosed by a circular deck that is 4 feet wide. What is the area of the deck? Use ? = 3.1416.
A. 301.6 ft2
B. 584.3 ft2
C. 314.2 ft2
D. 703.7 ft2
Answer: A
Mathematics
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Find the product.(8x + 5y)2
A. 64x2 + 25y2 B. 64x2 + 80xy + 25y2 C. 8x2 + 80xy + 25y2 D. 8x2 + 25y2
Mathematics
Find the center of mass of a thin plate covering the given region with the given density function.The region enclosed by the parabolas y = 72 - x2 and y = x2, with density ?(x) = x2
A. 
= 36, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 36
D. 
= 0, 
= 72
Mathematics
Translate to an equation, then solve.Twice the difference of four and n is the same as four subtracted from negative one times n.
A. 2(n - 4) = 4 - n, n = 4 B. 2(4 - n) = -n - 4, n = 2 C. 2(4 - n) = -n - 4, n = 12 D. 2(4 - n) = -n - 4, n = 4
Mathematics
Find the one-sided limit.
A. 6 B. -3 C. -6 D. 3
Mathematics