Mathematics, 19.03.2021 20:40, heroicblad

Charmaine purchased a prepaid phone card for $20. Long distance calls cost 19 cents a minute using this card. Charmaine used her card only once to make a long distance call. If the remaining credit on her
card is $16.58, how many minutes did her call last?

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Charmaine purchased a prepaid phone card for $20. Long distance calls cost 19 cents a minute using...