Question

the cost of internet access in a hotel is $18 rof the first 35min. and 0.04permin for an additional min, write a function decsribing the cost of the service as a function of min. used on line?

Answer 1

If t =time online in min then the total cost C as a function of time
\[C=18 + (t-35) \times 0.04\]

Answer 2

\[C = 18 +[ (t-35) \times 0.04] where \ t \ge35\]

Answer 3

C = 18 for 0<t<35 min