Mathematics, 01.08.2019 21:20 alonzo8217
The ph scale measures how acidic or basic a substance is. normal drinking water needs to have a ph of less than 8.5 and greater than 6.5. model the normal range of ph values of water, using a compound inequality.
a. 6.5 < x < 8.5
b. 6.5 > x > 8.5
c. 6.5 ≤ x ≤ 8.5
d. 6.5 ≥ x ≥ 8.5
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