中學數學 中二數學 (急)

1.Nelson has deposited $15 000 in Wealthy Bank for 1 year and will receive $300 simple interest.
(a)Find the interest rate per annum
(b)If Nelson will withdraw the amount and deposit it in Fortune Bank with the same interest rate per annum but compounded half-yearly, find his interest earned after 3 year. (Give your answer correct to the nearest dollar.)

2.Mr.Chan borrows a sum of money from a financial company at an interest rate 20% p.a. compounded yearly. If he has to repay the amount of $8 294.4 after 4 years,
(a)how much does Mr. Chan borrow from the bank?
(b)find the interest he has to pay.

3.For a principal of $6 000, a deposit period of 6 year, and an interest rate of 7.2% p.a.,
(a)find the amount if the interest is compounded half-yearly. (Give your answer correct to the nearest dollar.)
(b)find the amount if the interest is compounded quarterly. (Give your answer correct to the nearest dollar.)
(c)The method in (a)/(b) gives more interest.

4.Fanny deposits $34 000 in a bank. The interest rate is 8% p.a. compounded monthly. Find the interest earned after one and a half years.(Give your answer correct to the nearest dollar.)

5.Richard borrows a sum from a bank at an interest rate of 24% p.a. compounded every 4 months, and he has to pay an interest of $31 165.44 after 1 year. How much does he borrow from the bank?

6.The rateable value of a flat is $64 000 for this year and the rates percentage charge is 5%. Find the annual rates payable.

7.The quarterly rates of a flat is $1 050 for this year and the rates percentage charge is 5%. Find the rateable value of the flat.

8.The annual rental rental income received by the owner of a flat is $117 600 and the property tax rate is 15%. Find the property tax payable by the owner of the flat.