Question

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

Answer 1

B

Explanation:

Answer 2

Answer: B. 6.5 > x > 8.5

Explanation:

Given : The pH scale measures how acidic or basic a substance is.

The lower limit of pH of drinking water = 6.5

And the upper limit of pH of drinking water = 8.5

Also, Normal drinking water needs to have a pH of less than (<) 8.5 and greater than (>) 6.5.

Since the limit points not included, then the normal range of pH values of water, using a compound inequality. will be :_

`6.5 > x > 8.5`