The cost of developing film is 5.49 per roll. There is also 6% sales tax charged. What would be the cost of developing 1 roll of film after tax?

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.