Given:
Total solution : 1000mL
Pure acetic acid = 26mL
To find:
The percent concentration of given solution.
Solution:
We know that,

Putting the given values, we get



Therefore, the percent concentration of this solution is 2.6%.
The answer would be theorem Side angle side (aka SAS)
Since you'd didn't specify what place value I'm assuming it's the whole number so the answer is: 80,000,000