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

B. 6.5 > x > 8.5

Step-by-step 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 :_

i only know the sequence of arithmetic it adds the first is 5+4 then it goes up as it adds to then it is 9+5 then 14+6 then to 20+7 and so on. 5,9,14,20,27,35.

step-by-step explanation:

step-by-step explanation:

its 512 because parenthesis and to the 2nd power is 512 so it will be 512