Question 841433
how long it take an investment to quadruple in value if it earns 4% simple interest per year?


A = P(1 + rt)


4P = P(1 + rt)


4P = P(1 + 0.04t)


4P/P = 1 + 0.04t


4 = 1 + 0.04t


4-1 = 0.04t


3 = 0.04t


0.04t = 3


t = 3/0.04


t = 75


It will take <font color="red">75 years</font> for the investment to quadruple.