Answer:
There are two unknown lengths that we need to find.
The upwards rectangle intersecting with the horizontal rectangle's inner side lengths would be;
28ft(total length) - 12ft(one given side length of different rectangle)
= 16 feet.
Now the horizontal rectangle's inner length that intersects with the upwards rectangle would be;
40ft(total length) - 12ft(one given side of different rectangle)
= 28 feet.
Now add all the lengths:
12 + 40 + 28 + 12 + 16 + 28
= <u>136 feet</u> is the perimeter of the swimming pool.
Now they want us to find the total cost it would take to place tiles that cover <u>one yard</u>.
We first convert the feet into yards knowing that;
1 yard = 3 feet.
136(perimeter in feet)/3 feet(which make up a single yard)
= 45.333... which can be rounded to 45.3, so the perimeter of the pool in yards is 45.3.
Now since each of those yards contains $15, we multiply the many yards that cover the perimeter of the pool by the cost of one tile.
45.3 x 15
= 679.5, so it would cost approximately <u>$679.50</u> to place tiles along the pool.