A coal-burning electrical generating plant emits sulfur dioxide into the surrounding air. The concentration C(x), in parts per million,is approximately given by the function:

C(x)= 0.5/x^2,

where x is the distance away from the plant in miles. The instantaneous rate of change of sulfur dioxide concentration:

A) 5 miles from the plant=____
B) 8 miles from the plant=____

  1. 👍 0
  2. 👎 0
  3. 👁 962
  1. C ' (x) = - x^-3 or -1/x^3

    when x = 5, C ' (5) = -1/125

    when x = 8 , .......

    1. 👍 0
    2. 👎 1

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