A few days ago
Anonymous

Need help, please show work?

A woman deposits $50,000 in a savings account with 4% continuously compounded interest. How many years must she wait until the balance has doubled?

Top 5 Answers
A few days ago
Anonymous

Favorite Answer

100,000 = (50,000) (1.04)^t double the amount

(1.04)^t = 2 divide by 50,000

t log 1.04 = log 2 logs to clear exponent

t = log 2/log 1.04

t = 17.68 yrs ~ 17 yrs and 8 mos

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A few days ago
picador
Actually you would repetitively multiply by 1.04 until the result equals or exceeds 100,000, and the answer would be the number of times you hit “X”.

As a matter of interest, there is something called “The rule of Seven” which says that at 10% money doubles in 7 years, or in 10 years at 7%.

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A few days ago
navy_bison
Future Value = FV and Present Value =PV

FV = PV (1 + r)^n

100,000 = 50,000 (1 + 0.04)^n

Plug and chug. Good luck to ya!

Use rule of 72

72/4= 18 years to double see the link as well!

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A few days ago
Anonymous
About 17 and a half years, you should have $100,000.

To figure compound interest, google “compound interest calculator”.

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A few days ago
xoooooooo
50,000 * 0.04 = how much you earn in a year

then figure it out from there

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