All students in each grade
audience: <u>students</u> - counts for both boys and girls.
option (B) for teachers is irrevelant.
option (C) doesn't include girls.
option (D) doesn't include the entire school
Hence, option A is correct.
1.26
in A decimal
hope it helps
The difference is 180 is the correct answer for the problems
The rule is to put them in order
I think you mean,

You can use the usual formula,

That in this case is,

Where I have used,