You can put this solution on YOUR website!
How much principal should you invest at 4% in order to have $3,000 for a vacation to Europe in 3 years?
thats essentially what you are doing, here's how that came about:
Use the compound interest formula which pretty simple since it is compounded yearly
P*(1+r)^t = A
P = the principal
r = interest rate (.04)
A = Accumulated amt (3000)
t = time (3 yrs)
P*(1.04)^3 = 3000; find 1.04^3 on your calc, you don't need logs
P*1.124864 = 3000; (they rounded it to 1.125)
P = $2,666.99 invested to increase to 3000 after 3 yrs
Check on a calc: enter 2666.99(1.04^3) = 3000