If DF= 9x-39, find EF.
1 answer:
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Part A:
Given that the base radius of the scale model is 6 in while the base radius of the actual merry-go-round is 10 ft = 10 x 12 = 120 in.
The ratio of the radius of the actual merry-go-round to the radius of the scale model of the merry-go-round is given by 120 : 6 = 20 : 1.
The ratio of the area of the actual merry-go-round to the area of the scale model of the merry-go-round is given by
.
Therefore, the <span>base area of the actual merry-go-round is 400 times greater than the base area of the scale model.
Part B:
The base area of the merry-go-round is in the shape of a circle.
The area of a circle is given by
Given that the radius of the actual merry-go-round is 10 ft.
Therefore, the base area of the actual merry-go-round is given by
</span>
Given that the base radius of the scale model is 6 in while the base radius of the actual merry-go-round is 10 ft = 10 x 12 = 120 in.
The ratio of the radius of the actual merry-go-round to the radius of the scale model of the merry-go-round is given by 120 : 6 = 20 : 1.
The ratio of the area of the actual merry-go-round to the area of the scale model of the merry-go-round is given by
Therefore, the <span>base area of the actual merry-go-round is 400 times greater than the base area of the scale model.
Part B:
The base area of the merry-go-round is in the shape of a circle.
The area of a circle is given by
Given that the radius of the actual merry-go-round is 10 ft.
Therefore, the base area of the actual merry-go-round is given by