Please help me thank you if you do have a good day

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)