Olaf and Sven are baking cookies and cakes for the Norwegian Christmas celebration at Epcot. Olaf can bake 55 cookies and cakes in 4 hours. Sven eats 5 cookies and cakes every hour every hour. How long will it take Olaf
and Sven to bake 490 cookies and cakes together?

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.