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Karolina0304
16.12.2020 •
Mathematics
Afunction is defined by (x)=Bx+16. What is f(2.5)?
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Ответ:
70686 sq.ft.
Step-by-step explanation:
Given : Radius of the whole space is 250 ft.
Radius of pond is 200 ft.
To Find: the square feet of gravel needed
Solution:
Area of whole space =![\pi r^2](/tpl/images/0159/9336/8463b.png)
=![3.14(250)^2](/tpl/images/0159/9336/5f7b9.png)
=![196250](/tpl/images/0159/9336/5b9a4.png)
Area of Pond =![\pi r^2](/tpl/images/0159/9336/8463b.png)
=![3.14(200)^2](/tpl/images/0159/9336/901a2.png)
=![125600](/tpl/images/0159/9336/110d8.png)
So, the square feet of gravel needed =![196250-125600](/tpl/images/0159/9336/54913.png)
=![70650](/tpl/images/0159/9336/49522.png)
Hence 70650 sq.ft. of gravel is needed.
So, Option D is approximately equal to the obtained answer
So, Option D is true.