$/20 s double at its over pounded continuous 127. Finding the Date Solve the equation A - Pe" for p. then find the mate at which a deposit of $1000 would double in 3 years compounded continuously 128. Finding the Rate At what interest rate would a deposit of $30,000 grow to $2, $40.689 in 40 years with continuous compounding? 120, Rule of 70 a. Find the time that it takes for an investment to double at 10% compounded continuously. b. The time that it takes for an investment to double at % is approximately 70 divided by r (the rule of 70). So at 10% an investment will double in about 7 years. Explain why this rule works