Answer:
He is not painting the bottom or top meaning that he will paint 4 sides total, when there is a rectangular prism there are 6 sides and 3 pairs of 2 equal sides, so since there is a wall that is 9ft x 7 ft there is two of those, and since there is a wall that is 12 ft x 7 ft there are two of those as well. meaning that (7x9)·2=126 and (12x7)·2=168 when added we get 294. meaning that he needs to paint an area of 294 ft
4 feet And 3 Feet
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It would require 5.25 cups.
Since the amount of chlorine mixture necessary is proportional to the volume of water in the pool, we will use the scale factor of the volume of the two pools, 4/7, to set up a proportion.
4/7 = 3/x
Cross multiply:
4*x = 3*7
4x = 21
Divide both sides by 4:
4x/4 = 21/4
x = 5.25
The property is the Commutative Property
