PLS help with this several questions. You can just write the answer

1.The Highway Department sets aside $150 million for maintenance costs. The maintenance cost at the end of the first year of operation is $12 million and is expected to increase 3.5% each year after that. If the expected rate of return is 9.5% per year, how long will the $150 million last?

2. New financial regulations have forced banks to reveal the effective annual interest rate they charge on credit card balances. This was introduced because customers facing 33% annual interest rates with weekly compounding, gravely underestimated the high effective interest rates that they were being charged. What is the effective annual interest rate?

3. A store offers you an unbelievably good deal on a premium washing machine, advertised as being worth P=$1300. You can buy the machine in N=7 monthly installments of A=P/N at a 0% rate of interest! However, it seems that this deal is a little too good to be true. A friend warns you that you are actually paying interest at an annual rate of 37%! What is the actual value of the washing machine today?

4. Suppose you owe $1150 on your credit card. The annual percentage rate (APR) is 17%, compounded monthly. The credit card company says your minimum monthly payment is $20 (A1).

a. If you make only this minimum payment, how long will it take for you to repay the $1150 balance (assuming no more charges are made)?

b. If you make the minimum payment plus $7 (A2) extra each month (for a total of A1+A2), how long will it take to repay the $1150 balance?