Mathematics, 01.03.2021 19:20 gatewood1058

Mario is using a pay phone. The phone costs 50¢ for the first 3 minutes, and 10¢ for each additional minute. How much does it cost if Mario uses the phone for 21 minutes?

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Mario is using a pay phone. The phone costs 50¢ for the first 3 minutes, and 10¢ for each additional...

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