Yes you can assume they are similar because the sides that correspond with one another are half of the big triangles measurements. 16/2=8 12/2=6 etc.
C, 1,020. There are 67 out of 100 students who do at least 2 hrs of chores a day, or 67%. Converting that to a decimal, you get .68, which you multiply by the number of students at the school to get your answer.
You would do 31.37 * .06 which would equal 1.88
So your tax is $1.88
