If it takes 15 years for the money to triple its value, what is the interest rate compounded bi-monthly?

What is the future value of a $500/month deposit at the end of 3 years? Your first deposit occurs now (at time 0) and your last deposit is at the end of period 36. the interest rate is 12% compounded monthly. Note: since the interest is compounded monthly, you'll want to use months as the time period for the problem. The applicable interest rate for each month would therefore be 1%. Please show work thanks.

A bank charges a 1.5% per month interest rate compounded monthly.

a) What is the annual NOMINAL interest rate it's charging?

b) What is the EFFECTIVE interest rate it is charging?

a. What will be the monthly payment on a 30-year, $250,000 mortgage loan, where the interest rate is 6% per year, compounded monthly? How much interest is paid over the life of the loan?

b. What will be the monthly payment on a 30-year, $250,000 mortgage loan, where the interest rate is 6% per year, compounded continuously? How much interest is paid over the life of the loan?

c. What will be the monthly payment on a 15-year, $250,000 mortgage loan, where the interest rate is 6% per year, compounded monthly? How much interest is paid over the life of the loan?