Espa ol A phone company offers two monthly charge plans In Plan A there is no monthly fee but the customer pays 6 cents p minute of use In Plan B the customer pays a monthly fee of 8 60 and then an additional 4 cents per minute of use For what amounts of monthly phone use will Plan A cost at least as much as Plan B Use m for the number of minutes of phone use in a month and solve your inequality for m 0 D N D OSO 21