In rectangle ABCD, point Elies half way between sides AB and CD and halfway between sides AD and BC. AB = 4 and BC = 8, what is the area of the shaded region? Write your answer as a decimal if necessary,

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.