There are several bugs in WebWork that have been fixed:

Review 12.1 12.2: Problem 12 WebWork was not accepting the correct answer for certain variations of this problem. That has been fixed, but in the process you may have seen your specific problem change a bit.

Sections 12.5 12.6: Problem 12 and Sections 12.5 12.6: Problem 13 had a formatting error, making it challenging to read the problems. That has been fixed.


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