Question

What is the circumference of a circle with a radius of 1.4 m?

Answer 1

https://www.dropbox.com/s/bu5nbfitwpgm70q/Screenshot%202015-06-16%2022.21.23.png?dl=0

Answer 2

I'm guessing 2 x 3.14 x 1.4 ?

Answer 3

yes! what do you get?

Answer 4

8.792

Answer 5

here we have to apply this formula:
\[C = 2 \times \pi \times 1.4 = ...inches\]

Answer 6

I still have 8.792

Answer 7

no, please we have to do this computation:
\[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;inches\]

Answer 8

oops..
\[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;meters\]

Answer 9

C= 8.792=8.792 = 8.792

Answer 10

here you have to multiply 2*1.4 only, so our answer is:
\[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;meters\]
and we have finished

Answer 11

\[C = 2.8 \times \pi \;meters\]

Answer 12

2.8 x pi meters = 8.792 :I

Answer 13

you don't have to multiply 2.8*3.14

Answer 14

okay, without pi it would be 2.8 which would be D ;D

Answer 15

Thank you!

Answer 16

that's right!
:)