If f (x)=k log5x, where k is a constant, then f(5)-f(25)= A) - k
B) - 5k
C)-20k
D)1/5
E)1/2​

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.