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AP Calculus AB· difficulty 2/5

A rectangle's length grows at 22 and width shrinks at 11 (units/s). When L=5,W=3L = 5, W = 3, the area changes at

  • A

    33

  • B

    11

    check_circle
  • C

    66

  • D

    1111

Explanation

A=LWA = LW, dA/dt=LW+LW=5(1)+2(3)=1dA/dt = L W' + L' W = 5(-1) + 2(3) = 1.

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