i need answers to my finite mathematics weekly discussion

I need answers to the following questions. Please show your work:

5. If you paid
$$ 150$ to a loan company for the use of
$$ 4, 000$ for
$90$ days, what annual interest rate did they charge?

10. Use the continuous compound interest formula to find the indicated value P=$ 2,570; r=3.14%; t=4
years;
$A = ?$

21. What is the present value of an annuity that pays $
$200$ per month for
$10$ years if money is worth
$5 %$ compounded monthly?

25. A family has a
$$ 150, 000$
$30$ -year mortgage at
$4.5 %$ compounded monthly. What is the monthly payment?