Let x be the number of days since you opened your checking

| December 3, 2016

Question
8) Let x be the number of days since you opened your checking account and let −25×2+40x+1000be the number of dollars in your account on the xth day. a) How much money is in youraccount on the 10th day? b) What is the derivative on the 10th day? c) Without plugging11 into anything, use parts a) and b) to estimate how much money is in your account on the11th day. d) What is the derivative on the 100th day? e) Until which day is the derivativepositive? f) On which days is money going into your account faster than it is going out? g)On which day will the amount in your account be the same again as when you opened it?

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