Question

rearrange this formular to make r the subject.

A=4πr²

Answer 1

sqrt(A/4π)

Answer 2

sqrt? I don't understand

Answer 3

\[\sqrt{A/4π} \]

Answer 4

so,
r=√A/4π?

Answer 5

yes.

Answer 6

\[A=4 \pi r^2\]
\[r^2=A/(4 \pi)\]
take square root of both sides

Answer 7

how did you work that out? It's for an upcoming exam

Answer 8

look, 4π is being multiplied on the right... so it will b divided with A.

A/4π = r^2

Answer 9

then a Sqrt to cancel the square.

Answer 10

finally u r done with r.

Answer 11

thanks c:

Answer 12

C: