I want to confirm if my answers are right:

15. If the interest rate is 8%, what is the net present value of a security that pays you $350 next year, $385 the year after, and $436 the year after that?

1,000.35

16. If the interest rate is 10%, what is the net present value of a security that pays you $350 next year, $385 the year after, and $436 the year after that?

963.93

17. What is the interest rate of a loan of $100 if you have to pay $110 next year?

10%

18. You decide to purchase a new home and need a $100,000 mortgage. You take out a loan from the bank that has an interest rate of 7%. What is the yearly payment to the bank to pay off the loan in twenty years?

$9,439.29

15. If the interest rate is 8%, what is the net present value of a security that pays you $350 next year, $385 the year after, and $436 the year after that? 16. If the interest rate is 10%, what is the net present value of a security that pays you $350 next year, $385 the year after, and $436 the year after that? 17. What is the interest rate of a loan of $100 if you have to pay $110 next year? 18. You decide to purchase a new home and need a $100,000 mortgage. You take out a loan from the bank that has an interest rate of 7%. What is the yearly payment to the bank to pay off the loan in twenty years