Communications The cost of a cellular phone call within
Chapter 11, Problem 11.2.80(choose chapter or problem)
Communications The cost of a cellular phone call within your calling area is $1.25 for the first minute and $0.15 for each additional minute or portion of a minute. A model for the cost C is given by where t is the time in minutes. (Recall from Section 1.3 that the greatest integer less than or equal to x.) (a) Sketch the graph of C for (b) Complete the table and observe the behavior of C as t approaches 3.5. Use the graph from part (a) and the table to find (c) Complete the table and observe the behavior of C as t approaches 3. Does the limit of as t approaches 3 exist? Explain.
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