What does PLU 4002 represent?

What kind of level of measurement is salaries of statistic professors? I need the expanded form for 991030000? What is having three sides? Is 165 cm taller than 1.8 m? Decrease 1hour 40minutes by 2.5? What numbers should you call for helping you stop commiting suicide? How many times does GOD call someone your servant? Where does the word addition come from? What equals 56 cents and uses 3 kinds of coins and is 8 coins in all? What term is pi short for? What is 56.94 as a mixed number in its simplest form? What is the product called after an aniamal is harvested? Where can one purchase blank postcards? What is the perimeter of a rectangle that has an area of 81 sq in? What number does a meter stop at? How do you simplify the expression 4-(-3)? Is there a math operation that precedes addition like addition precedes product and product precedes exponentiation? What is 45 base 8 multiplied by 7 base 8? What is 0.7 hours? How many days have there been between June 3rd 1997 and January 1st 2010?