Respuesta :
they sell 4 and more than10 for a total of at least 14 tons
the mine extracts 2 ton per hour
so 14/2 = 7 hours a day minimum
so the inequality should be x>7

they sell 4 and more than10 for a total of at least 14 tons
the mine extracts 2 ton per hour
so 14/2 = 7 hours a day minimum
so the inequality should be x>7