Answer: it is 49 or -49
Step-by-step explanation:
if you divide 49 by 7 it comes out to seven because 7 times 7 is 49.
To find area we multiple length by width
20 times 45 is 900
then multiply that by 2 because there are two floors that are that size
900 times 2 is 1800
the total area for both floors is 1800 square feet