Find a mixture that will make the different the shade of green that is bluer

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

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work