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ycow [4]
3 years ago
11

Picture attached please help

Mathematics
1 answer:
bogdanovich [222]3 years ago
5 0

Answer:

D

Step-by-step explanation:

red blood cell = 0.000009 = 9 × 10^{-5}

cold virus = 0.0000003 = 3 × 10^{-7}

Divide diameter of red blood cell by diameter of cold virus

\frac{9(10^-5)}{3(10^-7 )}

= 3 × 10^{-5-(-7)}

= 3 10^{-5+7}

= 3 × 10² → D

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