(2a)3 = this expression without exponents is?

Acar dealership pays you 5% commission on your first $10,000 on car sales and 8% commission on the sale amount over $10,000 if you sold a $12,000 car how much is your commission

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.