Answer:
Your question was very confusing but I tried...
Step-by-step explanation:
Area = 8,100 square feet
area of a square = a²
8,100 square feet = a²
√8,100 square feet = √a²
90 feet = a
total length each row of bookshelf is 4/5 of the length of the storage space.
90 feet * 4/5 = (90*4)/5 = 360/5 = 72 feet.
Area = (72 ft)²
Area = 5,184 square feet.
Hope this helped :)
This expression is a difference of squares:

Answer:
try doing this for each quesion
so you see the negative? well negative means less than more. then use your signs and try to get it done reply if you still dont understand
Step-by-step explanation: