(A)
(B)
(C)
(D)
(E)
(A)
(B)
(C)
(D)
(E)
(A)
(B)
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(E)
A vertical circular cylinder has radius r ft and height h ft. If the height
and radius both increase at the constant rate of 2 ft/sec, then the rate, in
square feet per second, at which the lateral surface area increases is
4 πr
2 π(r + h)
4 π(r + h)
4 πrh
4 πh
A tangent drawn to the parabola y = 4 − x 2 at the point (1, 3) forms a
right triangle with the coordinate axes. The area of the triangle is
1
Two cars are traveling along perpendicular roads, car A at 40 mph, car B
at 60 mph. At noon, when car A reaches the intersection, car B is 90 mi
away, and moving toward it. At 1 P.M. the rate, in miles per hour, at which
the distance between the cars is changing is
−40
68
4
−4
40
For Question 82, if t is the number of hours of travel after noon, then the
cars are closest together when t is
