The rate of sales of a certain brand of bicycle by a retailer in thousands of dollars per month is given by S(t) = 33t – 0.3t2 where t is the number of months after an advertising campaign has begun. (a) Find the amount of sales, in thousand of dollars, for the first five months after the start of the advertising campaign. Give you answer to three decimal places. thousand dollars (b) Find the average sales per month for the second five month period of the advertising campaign. Give you answer to three decimal places. thousand dollars per month

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