Since each term in a polynomial is a monomial, multiplying polynomials becomes multiplying monomials. When multiplying monomials, use the product rule for exponents. The factors are regrouped, and then multiplied. Notice the product rule for exponents at work [when the bases are the same, add the exponents.
Them all as he has to know how far he travels the customer rate to see is there is an increase of decrease price of gasoline to see if it's affecting g his outcome and price per miles for obvious reasons haha