1.	How many significant digits are in the number 0.000005721?
		A.	six	B.	two
		C.	nine	D.	four
		Hint
	2.	How many significant digits are in the number 0.000723?
		A.	7	B.	3
		C.	4	D.	6
		Hint
	3.	Identify the precision unit of the scale.
		A.	12 pound	B.	1 pound
		C.	10 pounds	D.	5 pounds
		Hint
	4.	Find the sum of 23.6 liters, 4.75 liters, 12.065 liters, and 9.11 liters using the correct precision.
		A.	50 liters	B.	49.5 liters
		C.	49.53 liters	D.	49.525 liters
		Hint
	5.	Use the correct number of significant digits to find the area of the parallelogram.
		A.	41.23 square meters	B.	41.2 square meters
		C.	41 square meters	D.	41.225 square meters
		Hint