Question 978805
P=Po{1+r}^13; r is the interest rate
900,000=15000 {1+r}^13

60={1+r}^13
ln of both sides
4.093=13  ln{1+r}
divide by 13
0.3148=ln (1+r)
raise to e power
1.3700 (NOTE: I have not rounded on the calculator until the end)
1.3700=1+r
r=37% or  0.37