Start with the standard form of a circle, where is the center of the circle and
is the radius.
Plug in the known values.
This is the circle's equation in standard form.
Find a factor pair of 80 that has a sum of 21
2 answers:
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Answer:
Step-by-step explanation:
We know that the diameter of the fountain is 3 feet and that it is in the center of the pond.
We know that the area of a circumference is:
where r is the radius of the circumference.
further
d = 2r
Where d is the diameter of the circumference.
Then the radius of the source is 1.5 ft.
The radius of the pond is 1.5 + 3 = 4.5 ft
Finally the area of the pond is equal to the area of the ring that is shown in the image
