Question

the size of a red blood cell is 0.000007 m and that of a plant cell is 0.00001275m show that a red blood cell is half of a plant cell in size.​

Answer 1

red blood cell is not half of a plant cell in size

Answer 2

Step-by-step explanation:

Given:

• Size of a red blood cell is 0.000007 m.
• Size of a plant cell is 0.00001275 m.

To Show:

• Red blood cell is half of a plant cell in size.

Solution: Changing the size of both cells into standard form.

Size of a red blood cell =

$= > 0.000007m = \frac{7}{ {10}^{6} }m \\ = > (7 \times {10}^{ - 6} )m$

Size of a plant cell =

$= > 0.00001275m = \frac{1275}{ {10}^{8} } m \\ = > ( \frac{1.275 \times {10}^{3} }{ {10}^{8} } )m \\ = > \frac{1.275}{ {10}^{(8 - 3)} } m \\ = > \frac{1.275}{ {10}^{5} } m \\ = > (1.275 \times {10}^{ - 5} )m$

★ Size of a red blood cell / Size of a plant cell ★

$= > \frac{7 \times {10}^{6} }{1.275 \times {10}^{ - 6} } \\ = > \frac{7 \times {10}^{( - 6 + 5)} }{1.275} \\ = > \frac{7 \times {10}^{ - 1} }{1.275} \\ = > \frac{7}{(1.275 \times 10)} \\ = > \frac{7}{12.75} \\ = > \frac{7}{13} (nearly) \\ = > \frac{1}{2} (approximately)$

∴ Size of a red blood cell = 1/2 x ( size of a plant cell ).