Question

you invest 1000$ at an annual growth intrest rate of 5%.how much money will your investment be worth in 20years?

Answer 1

Exponential growth

a = initial amount before measuring growth/decay ($1000)
r = growth/decay rate (often a percent)(5% or .05)
x = number of time intervals that have passed (20 years)

y=a(1+r)^20

Answer 2

sorry...the formula should read

y=a(1+r)^x