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25 July, 13:10

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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  1. 25 July, 17:01
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    Step-by-step explanation:

    c (t) = 40:0≤t≤400

    =40+0.50 (t-400) : t≥400
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