The common denominator would be 18. So, 5/6 becomes 15/18 and 7/9 becomes 14/18
The square root of 4 is 2 because 2•2 is 4
Answer:
The answer is <u>D: lll and IV only</u>
Step-by-step explanation:
The first solution contributes 0.78*1 = 0.78 L of acid.
The second contributes 0.64*6 = 3.84 L of acid.
There will be 7 L total of the new solution, and 3.84 + 0.78 = 4.62 total L of acid in it. So the new solution has a concentration of 4.62/7 = 0.66, or about 66%.