Question: Use the above function that describes the telephone monthly plan 20 C(t) = if 0 t60 (20+0.40(t-60) if t> 60 to answer the following

Use the above function that describes the telephone monthly plan 20 C(t) = if 0 t60 (20+0.40(t-60) if t> 60 to answer the following questions: 19. How much you will pay during a month that you talk 30 minutes? 20. If you payed $24 last month, how many minutes did you talk?

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