Suppose we put $15000 into an account earning 3% interest compounded continuously. How long will it take (in years) got us to have a balance of $45,000

Suppose $8,000 is invested in an account with an annual interest rate of 4.7% per year, compounded monthly. How much money will be in the account after 35 years? $ Round your answer to the nearest penny. How long will take for the investment to double? years. Round to two decimal place.

i need the answer quickly

Assume you put $400 per month into a retirement account for 14 years, and the account has an APR of 3.01% compounded monthly. What is the account balance at the end of the 14 years? Round your answer to the nearest cent. How much of the money in the account at the end of the 14 years is your personal investment, meaning that the money came directly from you? How much of the money in the account at the end of the 14 years is interest? What percentage of the account balance after 14 years is interest? Hint: The percentage of interest in the account is equal to the amount of the account ballance that is interest divided by the base account balance. Multiply that result by 100 to get a percentage. Round your percentage to one decimal place.