Answer:
6/5
Step-by-step explanation:
The answer to your question is (1,9) :)
Surface area=2A + BH
where A is the area of the base, B the perimeter of the base and H the height.
S.A=2*4.5*6 +2(4.5+6)*12
S.A=54+252
S.A= 306 sq. inches
you would need to divide 90 by 3 because that is how many there are in each row.
you will get 30
then you need to multiply 30 by 2 becanse that is how many are in the rows on the left.
you will get 60,
so there are 60 seats on the left.