Question

Solve 4/3Π×6.66×10^6×5.5×10³​

Answer 1

Answer:

What is the circumference of a circle with an area of 36π?

Possible Answers:

None of the other answers

12π

6π

15π

32

Correct answer:

12π

Explanation:

We know that the area of a circle can be expressed: a = πr2

If we know that the area is 36π, we can substitute this into said equation and get: 36π = πr2

Solving for r, we get: 36 = r2; (after taking the square root of both sides:) 6 = r

Now, we know that the circuference of a circle is expressed: c = πd. Since we know that d = 2r (two radii, placed one after the other, make a diameter), we can rewrite the circumference equation to be: c = 2πr

Since we have r, we can rewrite this to be: c = 2π*6 = 12π