Write the Word or Phrase That Best Completes Each Statement

question 59

Essay

Write the word or phrase that best completes each statement or answers the question.
-A cellular phone plan had the following schedule of charges:
$$\begin{array} { l l } \text {Basic service, including 100 minutes of calls } & \$ 20.00 \text { per month } \\\text { 2nd 100 minutes of calls} &\$ 0.075 \text { per minute } \\\text { Additional minutes of calls } & \$ 0.10 / \text { per minute }\end{array}$$ What is the charge for 200 minutes of calls in one month?
What is the charge for 250 minutes of calls in one month?
Construct a function that relates the monthly charge C for x minutes of calls.