Question

To the nearest hundredth, what is the area of a circle with a circumference of 42 units?

Answer 1

we need to find the radius to find the area :\[C = 2\pi r\]lets plug in all the information for have\[42 = 2\pi r\]\[\frac{42}{2\pi } = r\]now plug in our new found radius into the area formula to get the answer \[A = \pi r^2\]

Answer 2

ohh so it would be 42/6.28 :/

Answer 3

if you are using 3.14 as pi then it would be that :)

Answer 4

then i divide that right :/

Answer 5

well what you get i will check you :)

Answer 6

6.69 :/

Answer 7

yep i got round there too so now that we know the radius we need to plug in the r for the area of a cirlce which is \[A = \pi (6.69)^2\]

Answer 8

wait thats not my answer :/

Answer 9

ohhh nv i got it lol so my answer would be 140.53 :/

Answer 10

yep! :)

Answer 11

ohhh i c thank u :D

Answer 12

no problem :)