Precalculus Key Math Resources, Calculator Programs, Links, Sketchpad Activities http://www.keymath.com/x7060.xml
Height of the Tallest Mountain on Earth http://hypertextbook.com/facts/2001/BeataUnke.shtml
Latitude and Longitude of Place on Earth http://www.bcca.org/misc/qiblih/latlong.html
The Algebra of Functions http://homepages.ius.edu/pmiller/M122/algebra_of_functions.pdf
Algebra Review http://www.sosmath.com/algebra/algebra.html
Asymptotes: Vertical, Horizontal, and Slant http://www.purplemath.com/modules/asymtote3.htm