Ask a New Question

Asked by Merry

A principal earns 7% per year simple interest. How long will it take for the future value to quadruple?
9 years ago

Answers

Answered by Reiny
consider $1

to obtain 4 times the $1, we need $3 in interest

3 = 1(.07)(t)
t = 3/.07 = appr 42.9 years

check:
consider $100
interest at 7% for 42.9 years
= 100(.07)(42.9 = 300.3
so add that to the 100 we started with, we get 400.3
9 years ago

Related Questions

1. A 3,500.00 principal earns 3% interest, compounded semi annually. After 20 years, what is the bal... 1. A 3,500.00 principal earns 3% interest, compounded semi annually. After 20 years, what is the bal... A $6,300.00 principal earns 6% interest, compounded annually. After 3 years, what is the balance in... A $4,000.00 principal earns 5% interest compounded annually. After 4 years, what is the balance in t... 1) A 3, 300.00 principal earns 4% interest compounded annually. After three years, what is the balan... A $4,000.00 principal earns 5% interest, compounded annually. After 4 years, what is the balance in... A $1,600.00 principal earns 7% annual interest, compounded semiannually( twice per year). After 33 y...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use