Question

given the area A of a circle, the formula r= √a/π can be used to calculate the radius of the circle. find the area when the radius is 9.9cm.

Answer 1

put the values in the formula = \(\Large{r={\sqrt{a}\over\pi}}\) i.e.;
\(\Large{{9.9={\sqrt{a}\over3.14}}}\)

Answer 2

I use \(\Large{\pi=3.14}\)

Answer 3

solve this :)

can u do it ????

Answer 4

do i move 9.9 on the other side?

Answer 5

i mean solve for 'a'

Answer 6

okay

Answer 7

sorry no

Answer 8

u must move 3.14 on left side