16. An air-freshener starts with 30 grams and evaporates over time. In each of the following cases, write a for- mula for the quantity, Q grams, of air-freshener remain- ing t days after the start and sketch a graph of the func- tion. The decrease is: (a) 2 grams a day (b) 12% a day

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A: Solution: ∫-3dy2y2+14y+70 Take out the common -32∫1y2+7y+35dy

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A: Explained below 

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