Can someone help me find an equation for both of these ❤️

Carl wants to buy a television that cost $500 including taxes. to pay for television he will use a payment plan that requires him to make a down payment of $125 and then pay $70.50 each month for six months what is the percent increase from the original cast of the television to the cost of the television using a payment plan.

Volume of cylinder with a radius of 8cm and height of 25 cm

What are “like terms”? why can we only add like terms?