I’m really confused by this and need ?

What is the base of 1/9 to the power of 2

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.

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5