(6) A piece of ice cut in the shape of a cube melts uniformly so that its volume decreases at 3 cm³/sec. How fast is its surface area, A, decreasing when the edge, x of the cube is 5 cm? (A) (C) = cm²/sec = 3 cm²/sec (B) (D) 2.4 cm²/sec :6 cm²/sec

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(6) A piece of ice cut in the shape of a cube melts uniformly so that its volume decreases at
3 cm³/sec. How fast is its surface area, A, decreasing when the edge, x of the cube is 5 cm?
(A) A = 12 cm²/sec
$
(C)
= 3 cm²/sec
dt
dA
(B)
(D)
14
dt
-
2.4 cm²/sec
= 6 cm²/sec
Transcribed Image Text:(6) A piece of ice cut in the shape of a cube melts uniformly so that its volume decreases at 3 cm³/sec. How fast is its surface area, A, decreasing when the edge, x of the cube is 5 cm? (A) A = 12 cm²/sec $ (C) = 3 cm²/sec dt dA (B) (D) 14 dt - 2.4 cm²/sec = 6 cm²/sec
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