sean has 4 science fiction books for every 3 sports books. which graph represents his book collection?

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Which graph has a rate of change of zero