Problema Solution
rental of a pressure washer costs $30 for the first 4 hours and $10 per additional hours or part of an hour. If x is the total hours rented,what is the total cost,y?
Answer provided by our tutors
y = 10(x-4) + 30
y = 10x - 40 + 30
y = 10x - 10
we require that 'x' is always rounded up [ceiling function], so that 1.2 hours is x=2 hours, then the total cost, y:
y = 10x - 10