Question: Please show work. 2. We sometimes need to find how long it will take a sum of money (or anything else) to grow to some

Please show work. 2. We sometimes need to find how long it will take a sum of money (or anything else) to grow to some specified amount. Note that you should enter PV as a negative and FV as a positive.

(a) For example, if a companys sales are growing at a rate of 3.90% per year, approximately how long will it take sales to double? Show your answer to 2 decimals (x.xx years). If you are not sure how to work this, go back to this weeks practice problems.

(b) If you want an investment to triple in twenty-five years, what interest rate must it earn? Show your answer to 2 decimals (x.xx%)

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