Question

You receive a $7,000 check from your grandparents for graduation. You decide to save it toward a down payment on a house. You invest it earning 10% per year and you think you will need to have $14,000 saved for the down payment. How long will it be before the $7,000 has grown to $14,000? To double the money you received from your grandparents, it will take years. (Round to one decimal place.)

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Answer #1

Future value = Present value ( 1 + r)n

14,000 = 7,000 (1 + 0.1)n

2 = (1 + 0.1)n

LN 2 = n LN 1.1

0.693147 = n 0.09531

n = 7.3

It will take 7.3 years.

Keys to use in a financial calculator:

PV -7000

FV 14000

I/Y 10

CPT N

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