Some F.2 Maths Questions :)

Please show steps.

1. The length of a rectangle is increased by 25% and its width is decreased by 15%. Find the percentage change in its area.

2.Tony saved $25000 in a bank at a simple interest rate of 8% per annum. The interest after a period of time was $7000.

(a) How long did Tony save the money in the bank?

(b) If interesst was compounded half-yearly at 8% per annum, how much interest would he get for the same principal and the same period of time? (Give the answer correct to the nearest dollar.)

3. Daniel invested in a business (which is a limited company ) from which he earned a net profit of $250000 a year. He also rented out a property. The monthly rent was $15000, with rates paid by the tenant. The profits tax rate is 17.5% and the standard tax rate is 16%.

(a) Find the property tax he had to pay.
(b) Find the profits tax paid by him.