Find the inverse of each Function. Please don't send me a link to any websites other than

Is it possible for anyone to help me with these two problems and show a step-by-step formula by any chance?

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?