Typo in caption in Activity 11.7.2

[rhinopotamus]

In Activity 11.7.2 , the caption says that the figure on the left is the cone and on the right is the projection of the cone into the xy plane. These are in fact reversed.

There's of course two ways to fix this (swap the figures or swap the captions) -- I am agnostic as to which one I prefer, but note that some of the other text in the activity says "left" and "right" in particular ways.

[rhinopotamus]

(Broader philosophical note: I think it is weird, philosophically speaking, that the sub-parts of part (b) ask students to think about the limits on the integrals from outside in (that is, if dV = dz dy dx, to think about dx first) rather than inside out (that is, to think about dz first, then dy then dx).