An office manager is taking inventory of some of the equipment in the office in order to determine what new equipment should be ordered. according to the diagram, how many machines perform all 3 functions (print, copy and fax)? a) 3 b) 4 c) 5 d) 6

Which measurement is the most precise? a) 29 cm b) 28.8 cm eliminate c) 28.76 cm d) 28.762 cm

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.