N(x)=7(0.067)^x
what is the rate of decay, as a percent, for the following function?

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Sum is 17 and their difference is 3

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.