The profit that a company makes selling an item (in thousands of dollars) depends on the price of the item in dollars). If p is the price of
the item, then three equivalent forms for the profit are:

Standard form: -2p+ 24p - 54
Factored form: -20p - 3)(P-9)
Vertex form: -2(p - 6) + 18.

Which form is most useful for finding
1. The prices that give a profit of zero dollars? Explain
2. The profit when the price is zero? Explain
3. The price that gives the maximum profit? Explain