From the information you gave me, I am going to guess it is a 4 pack of highlighters.
Answer: $0.60 per highlighter
Explanation: To find the unit rate of an item, take the price ($2.40) and divide it by the amount of the product included (4).
When putting polynomials in standard form we arrange them from the term with the highest power to the lowest power.
This polynomial would be arranged: -3x^3-5x^2+8x-5
The degree of a polynomial is the power of the highest term so the degree of this polynomial is three.
P / 9 = 72
Multiply both sidess by 9
P / 9 (9) = 72 (9)
p = 648