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use speed time formula...

I've never heard of that.

related rates right?

Yeah, related rates.

\(A=\pi r^2\) and so \(A'=2\pi rr'\)

you are told \(r'=1.5\) and \(r=42\)
plug in the numbers and get \(A'\) in one step

wow, that was easy. I'm terrible at these.

yeah, i have to admit that one was real easy
they get harder

:(

yeah, I was just thinking like A=pi(r^t/1.5)^2 then I was super confused

That made absolutely no sense to me.