- A
- B⁻⁶ m
- C⁻⁶ m
- D⁻³ m
Step-by-Step Solution
Bacterium: from 1 to 3, so 2 µm. Red blood cell: from 4 to 11, so 7 µm. Difference µm m. (9 µm adds the two; m is a millimetre.)
Answer: B) ⁻⁶ m
The picture shows a bacterium and a red blood cell on a micrometre scale. How much wider is the red blood cell than the bacterium is long? Give the answer in metres in standard form.
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