Is this something you need to add to the sentence it would be the ingredients are missing.
Now, to find how many people are not there, all you have to do is subtract the amount of seats and the people there.
112- 70= 42
Now since there are 7 seats per row and 42 is divisible by 7, you can divide 42 by 7.
42÷7= 6
So, 6 rows were empty.
Only √3 is an irrational number, since you can't write it as a fraction
Age of martin is 38 and that of sherwin is 9