The time usage of a certain printer cartridge follows a normal probability distribution with mean S0 hours and standard devlation of 167 minutes. What time usage guarantee (in hoursj sthould the manficturar advertise in order to ensure that only 0.011% of the cartridges fail to meet the guaranteed time usage? OA0.64 OB 39 62 OCO48 OD.60.38

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