Description
In Activity 3.3.11(c), the way it's worded makes it sound like we are looking for the maximum rate of change when I think the intention is to ask which of the choices has the largest rate of change.
In addition, I would recommend changing the wording at the beginning of the activity about the Pythagorean theorem. It seems weird to say also known. It's primarily known as that in the western world. And while I appreciate pointing out that Pythagoras is not solely responsible for that theorem, it feels out of place where it is.
I would recommend a remark similar to Remark 3.3.8: Volume formulas describing the theorem. (Or a theorem environment stating the theorem.) With a remark or "fun fact" after about how the result was well known before him.