I'm having issues remembering how to create cost functions:
For a long-distance phone call, a hotel charges $9.89 for the first minute and $0.90 for each additional minute or fraction thereof. A formula for the cost is given below, where t is the time in minutes
So the function is ?
Do I just distribute that out?
Use a graphing utility to graph the cost function for 0 < t ≤ 5.
How do I set the paramaters for this requirement to graph this on my calculator ?