General Customs Administration of Mexico May 23 rd, 2013.
PRE-ALGEBRA. Lesson 6-4 Warm-Up PRE-ALGEBRA What is “percent”? How do you write a percent as a fraction or a decimal? percent: a ratio that compares.
WSOY’s strategies and services on learning material repositories Heikki Karjalainen WSOY Educational, Finland EdReNe Tallinn 16.9.2008.
1 EDTA Titration Lab Prep. 2 EDTA and Water Hardness Titration Water hardness is dissolved minerals –Ca 2+ + Mg 2+ Titrate dissolved Ca 2+ and Mg 2+ with.
Wheel of Probability Bernard Brooks youtube link.