The 5th edition saw the creation of an index by Michael Thatcher.  Robert Petry created an appendix on advanced factoring which included discussion of the Rational Roots Test, polynomial long division and factoring by grouping.  Maria Azam created figures which were further edited by Robert Petry to produce an appendix of geometric formulas which are useful for related rates and optimization problems.  Robert Petry added some Squeeze Theorem problems as well as an optimization problem regarding a tipi.  Several typos and formatting issues were corrected.
