BI-2176
Measuring length
Biology · Secondary 4 · Easy · Measuring length
A student measures the diameter of a circular plant cell on a photomicrograph as 16 mm. The magnification is ×400. What is the actual diameter of the cell, to two significant figures?
- 0.0040 mm
- 0.040 mm
- 0.40 mm
- 4.0 mm
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