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GarryVolchara [31]
2 years ago
5

Express the area A of a circle as a function of its​ radius, r. Determine the area of a circle whose radius is 11 inches. That​

is, find ​A(11​). Express the area A of a circle as a function of its​ radius, r.
Mathematics
1 answer:
nekit [7.7K]2 years ago
8 0
<h2>Answer with explanation:</h2>

The function represents the area of a circle(A) is given by :-

A(r)=2\pi r

To determine the area of a circle whose radius is 11 inches. , we put the value of r=11 inches, we get

A(11)=2\pi (11)

Now, we put \pi=\dfrac{22}{7} in the above function , we get

A(11)=2(\dfrac{22}{7} )(11)\\\\\Rightarrow\ A=56.5714285714\approx56.57

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