Question

一道sat数学题

at a bottling company, machine A fills a bottle with spring water and machine B accepts the bottle only if the number of fluid ounces is between 117\8（十一又八分之七）and 121\8(12又八分之一). if machine B accepts a bottle containing n fluid ounces, which of the following describs all possible value.
正确选项为 「」表示绝对值符号
「n+12」<1/8
怎么算呢？

Answer 1

EX=12
即B接受12为均值，上下误差为1/8的

Answer 2

下限是12－1／8＝11又7／8；上限是12＋1／8＝12又1／6