Answer:
R = rows
C = columns
The chairs will be arranged in a way such that R * C [tex]\geq[/tex] 70
We know that R [tex]\leq[/tex] 20
70 / 20 = 3.5; however, you can't have half of a chair.
So find all the factors of 70 which don't exceed 20.
1, 70
2, 35
5, 14
7, 10
There are four ways that Brooke can set up the chairs:
5 rows of 14
7 rows of 10
10 rows of 7
14 rows of 5
