HEWP Harry, Ron & Hermione are traveling to Hogwarts via the Hogwarts Express. Hogwarts is approximately 600 miles from Central London. If the Hogwarts Express travels at approximately 65mph, in how many hours will their train be 15 miles away from their destination?

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.