A company introduces a new product on a trial run in a city. They advertised the product on television and found the percentage P of people who bought the product after t ads had run satisfied the function 
(a) What percentage buys the product after the ad has been been run 1 time, 5 times, 20 times?
(b) Find the rate of change P?(t ) .
(c) Sketch a graph of the function.
(a) 5, 49%; 9.57%; 50.11%
(b) 
(c) 
Mathematics
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