11.1#10

Hey Dr. Taylor so I emailed you once about this already but you didn't respond so I'm nagging you. I only got this question correct because I google'd it, I honestly have no idea how to do it other than the (0,0) point, which I got by plugging in 0 and 0 for x and y.

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You *googled it*?? How did you do that?  Good job on the nagging btw.
So: yes, as you surmise, plugging in (0,0) will give the the value of 140 on contour "A".  My eye tells me that "B" hits the x-axis at approximately 0.4.  If I plug in x=0.4 and y = 0 into f(x,y) I get f(0.4, 0) = 208.85, to which the closest multiple of 10 is  210,  so that must be the value of "B". This gives me the gap between the contours and so I'm basically done.