openwebwork/webwork-open-problem-library — pull request #72 by paulvojta (2014-06-18 00:28:14+00:00)
Title: Fixed a buggy problem, and fixed typos in solutions

Changes for Rogawski problems:
8.3.13 was often ill posed;
8.3.31 had a possible TeX error in its solution;
8.1.40 had missing factors of pi in parts of the solution