If £2000 is placed into a bank account that pays 3% compound interest per year how much will be in the account after 2 years​

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Ineed i been stuck on this question since yesterday