The time t (in years) required for an investment to double with interest compounded continuously depends on the interest rate r 1n2 r . according to the function t(r) = (a) If an interest rate of 1.5% is secured, determine the length of time needed for an initial investment to double. Round to 1 decimal place. (b) Evaluate t(0.02), t(0.05), and t(0.09). Round to 1 decimal place. Part: 0/ 2 Part 1 of2 (a) If an interest rate of 1.5% is secured, an initial investment will double in approximately l:l yr