A telephone company offers the following plans. Also given are the piecewise functions that model these plans. Use this information to solve Exercises 95–96.Plan A• $30 per month buys 120 minutes.• Additional time costs $0.30 per minute.

Plan B• $40 per month buys 200 minutes.• Additional time costs $0.30 per minute.Simplify the algebraic expression in the second line of the piecewise function for plan B. Then use point-plotting to graph the function.

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C(t) 30 if 30+ 0.30(t – 120) if t > 120 - 0≤ t ≤ 120