Mathematics, 15.01.2020 22:31, axiabarbie

Speed cell wireless offers a plan of $40 for the first 400 minutes, and an additional $0.50 for every minute over 400. let t represent the total talk time in minutes. write a piecewise-defined function to represent the cost c(t)

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Speed cell wireless offers a plan of $40 for the first 400 minutes, and an additional $0.50 for ever...