If i need to find the relative loudness, what would i label my answer?

What is the missing constant term in the perfect square that starts with x^2 -20x

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is the volume of this container?