If an investment increased by 40% over 3 years and rose by the same percentage rate each of those years, what was the rate?
new_value = old_value(1+r)^p
The Attempt at a Solution
Let value of the investment be 1000, then we have 1000(1+0.4) = 1000(1+r)^3, r = 0.1187
r seems reasonable to me, but I am not sure that is right.