Mathematics, 13.11.2019 19:31, musicqueen360

Ayuden con esto la tarifa de telefonía de la empresa a es 20 euros fijos mensuales más 7 céntimos de euro por minuto de conversación, la de la empresa b es 11 euros fijos más 12 céntimos por minuto de conversión. ¿a partir de cuantos minutos empieza a ser más rentable la tarifa de la empresa

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Ayuden con esto la tarifa de telefonía de la empresa a es 20 euros fijos mensuales más 7 céntimos d...