[sf-lug] [PYCLASS] Still on exercise 2.1
Christian Einfeldt
einfeldt at gmail.com
Fri Oct 3 20:17:05 PDT 2008
hi,
Okay, with Jim's help, I was able to get past exercise 2.2. Now I am on
exercise 2.4.1, which poses this question:
The volume of a sphere with radius R is 4/3piRcubed. What is the volume of
a sphere with radius 5?
I have been vexed by this problem. As the problem is written, I am
interpretting it to ask me to first divide 4 by 3. Then, I am asked to
multiple the product of that figure by piRcubed. We are told that the
answer is _not_ 392.6, but that is the only answer that I seem to be able to
produce. Any thoughts? My results are below:
>>> (4/3)*(pi*5**3)
392.69874999999996
>>> (4/3)*pi*(5**3)
392.69874999999996
>>> (4/3)*(pi*(5**3))
392.69874999999996
>>> ((4/3)*pi)*(5**3)
392.69874999999996
>>>
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