Everything at Gary's General Store is on sale. The store offers a 20% discount. The regular price of a t-shirt at Gary's General Store is $18. What is the discount price?

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2