I need the answers for Q24 & 27

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.

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30