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Mathematics, 26.06.2019 15:10 marykatherine
The ph scale measures how acidic or basic a substance is. lemon juice is said to have a ph of less than 4 and greater than 1.5. model the normal range of ph values of lemon juice, using a compound inequality.
1.5 > x > 4
1.5 < x < 4
1.5 ≤ x ≤ 4
1.5 ≥ x ≥ 4
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