Solve the problem.A zoom lens in a camera makes a rectangular image on the film that is  length by  width. As the lens zooms in and out, the size of the image changes. Find the rate at which the area of the image begins to change  if the length of the frame changes at  and the width of the frame changes at 

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A. 4.4 cm2/sec
B.  cm2/sec
C. 5.6 cm2/sec
D. 1.1 cm2/sec


Answer: A

Mathematics

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