Solve the problem.The volume of water added to a circular drum of radius r is given by Vw = 30t, where Vw is volume in cu ft and t is time in sec. Find the depth of water in a drum of radius 5 ft after adding water for 17 sec. (Round result to one decimal place.)
A. 13.0 ft
B. 6.5 ft
C. 20.4 ft
D. 2.5 ft
Answer: B
Mathematics
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.2tx + 4t2 = 4, 2y - t2 - t = 0, t = 1
A. - 
B. - 6
C. 
D. 
Mathematics
Find the limit.
cos-1 x
A. 1 B. -1 C. 0 D. ?
Mathematics
Solve the problem.The radius of a right circular cone is given by the formula 
, where V is the volume and h is the height. If the volume is 1761 cubic inches and the height is 11 inches, what is the radius? Use 3.14 for ?, and round your answer to the nearest tenth of an inch.
A. 0.1 in. B. 12.4 in. C. 7.1 in. D. 12.9 in.
Mathematics
Evaluate the expression.(-a - b)2
for a = -1, b = 4
A. -15 B. 9 C. -25 D. 25
Mathematics