Hello My teacher skipped over this and I have no clue how to do this or the equations. Help would be wonderful thank you

Question

If 6000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 15 years if interest is compounded annually
Find the amount in the bank after 15 years if interest is compounded quaterly
Find the amount in the bank after 15 years if interest is compounded monthly
Finally, find the amount in the bank after 15 years if interest is compounded continuously

Answer 1

annually: 6000(1+.1)^15 = 25,063.49
qly: 6000(1+.1/4)^(15*4) = 26,398.74
mly: 6000(1+.1/12)^(15*12) = 26,723.51
cont: 6000*e^(.1*15) = 26,890.13

Answer 2

What is the future value of $800 invested for 14 years at 11 percent compounded annually