Formula Sheet—continued

Total Magnification of a Compound Microscope

Objective Lens	Objective Lens Magnification	Eyepiece Lens Magnification	Total Magnification
Low	4X	10X	40X
Medium	10X	10X	100X
High	40X	10X	400X

Calculating Surface Area to Volume Ratio

	Surface Area (SA)	Volume (V)	SA:V Ratio
Sphere	4nr2	4nr3/3	4nr2/4nr3/3
Cube	6s2	s3	6s2/s3

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