Mathematics, 29.10.2020 02:50, hamaama

A phone call costs $0.58 per minute for the first three minutes and $0.15 per minute for each additional minute. If the total charge for the call was $4.29, how many minutes long was the call?

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A phone call costs $0.58 per minute for the first three minutes and $0.15 per minute for each additi...