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The number of locusts, /, t days after an infestation is given by the
equation:
1 = 5t + 10t + 100
The area of grass left, a, in m is given by the equation a =
500
Use composite functions to determine the rate of change of the area
of grass on the sixth day.
Explain why there is a limit to the time over which these equations
would be realistic. (15 marks)

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The rate of change of the area of grass on the sixth day is 0 . 3... View the full answer

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