Question

Julia wants to use the data to determine which brand is most absorbent.Based on the data collected at the beginning of the contest, enter theapproximate number of paper towels needed to clean each square foot ofthe spill.Enter the number of Brand A paper towels needed per square foot in thefirst box.Enter the number of Brand B paper towels needed per square foot in thesecond box.Enter the number of Brand C paper towels needed per square foot in thethird box.

Answer 1

ok, so to know how many paper towels are needed to clean a square ft we can use crossed multiplication

Brand A:

we add up all the sq ft cleaned by brand a

0.75+1.50+2.25=4.5

and we add up all paper towels used in total

6+13+20=39

now

to clean 4.5 square ft, we need 39 towels. how many we need to clean a single square foot?

4.5 sq ft ___________39 towels

1 sq ft_____________A

and A= 1 sq ft * 39 towels / 4.5 sq ft

and that give us 8.6 towels, so we need 9 towels to clan a square foot with the brand A

now we repeat this with bran b and c

brand B:

0.75+1.75+2=4.5 sq ft

9+22+25= 56 towels

4.5 sq ft________56 towels

1 sq ft__________B

B= 1 sq ft * 56 towels / 4.5 sq ft = 12.4

so we need 13 towels of brand B

at last

brand C:

1+1.75+2.5=5.25 sq ft

17+29+41= 87 towels

5.25 sq ft________87 towels

1 sq ft__________C

C= 1 sq ft * 87 towels / 5.25 sq ft = 16.57 towels

so we need 17 towels of brand C to clean a single sq ft