Question

ONE QUESTION!

Answer 1

@Michele_Laino

Answer 2

hint:
since
\[\frac{A}{{{r^2}}} = \pi = constant\]
I don't think that A varies directly with r

Answer 3

better is to say that A varies directly with r^2

Answer 4

jointly is in fraction form correct?

Answer 5

yes I think so!

Answer 6

sincerely I think, namely the second option, since A doesn't varies inversely with r

Answer 7

oops..doesn't vary...

Answer 8

so B?

Answer 9

oh gotcha

Answer 10

yes!