(c) The diameter of a red blood cell is $$ 7.8 imes 10^{-6} \mathrm{~m} $$. In a scale drawing, the diameter of a red blood cell is 3.9 cm . (i) Find the scale used for the drawing. Give your answer in the form $$ n: 1 $$.

Question

(c) The diameter of a red blood cell is $$ 7.8 	imes 10^{-6} \mathrm{~m} $$. In a scale drawing, the diameter of a red blood cell is 3.9 cm . (i) Find the scale used for the drawing. Give your answer in the form $$ n: 1 $$.

UpStudy AI · Accepted Answer

1. Convert the drawing measurement to meters:  
   $$
   3.9\,\text{cm} = 0.039\,\text{m}
   $$

2. Write the actual measurement of the red blood cell's diameter:  
   $$
   7.8 \times 10^{-6}\,\text{m}
   $$

3. Determine the scale factor by dividing the drawing measurement by the actual measurement:  
   $$
   \text{Scale factor} = \frac{0.039\,\text{m}}{7.8 \times 10^{-6}\,\text{m}}
   $$

4. Perform the division:  
   $$
   \frac{0.039}{7.8 \times 10^{-6}} = 5000
   $$

5. Express the scale in the form $$ n:1 $$:  
   $$
   5000:1
   $$
The scale used for the drawing is $$ 5000:1 $$.

© The diameter of a red blood cell is .
In a scale drawing, the diameter of a red blood cell is 3.9 cm .
(i) Find the scale used for the drawing.
Give your answer in the form .

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© The diameter of a red blood cell is . In a scale drawing, the diameter of a red blood cell is 3.9 cm . (i) Find the scale used for the drawing. Give your answer in the form .