How lang will it take for $3,000 to grow to $7,000 if the investment earns an interest rate of 24$6 per year compounded monthly (i.6., 12 timas a year). Exact length of time (without using a calculator), t= years Length of time, rounded to 2 decimal places = years How long does it take for an investment earning interest at a rate of 6% compounded semiannually (i.e., 2 times a year) to double in value? Exact length of time (without using a calculator), t = years Length of time, rounded to 2 decimal places = years How long will it take for $2,000 to grow to $7,000 if the investment earns an interest rate of 5% per year compounded continuously. Exact length of time (without using a calculator), t= years Length of time, rounded to 2 decimal places = years