Hello, i_zz_y_ill!

A strange way to write the answer . . .The radius of a circular ink blot is increasing at a rate inversely poportional to its area

Find an expression for . . . . In terms ofwhat?.

Answer: .

Since is a constant, is zero.

So I must assume means "some other constant" . . . a sloppy answer!

We are told: . .[1]

Since , we have: . .[2]

Substitute [2] into [1]: .

Therefore: .