Question

5. The size of a red blood cell is 0.000007 m and the size of a plant cell is 0.00001275 m. Compare these two.​

Answer 1

Answer:

the size of a red blood cell is less than size of a plant cell

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 =

$\begin{lgathered}= > 0.000007m = \frac{7}{ {10}^{6}}m \\ \\= > (7 \times {10}^{ - 6} )m\end{lgathered} \\ \\</p><p>=>0.000007m$

Size of a plant cell =

$\begin{lgathered}= > 0.00001275m = \frac{1275}{ {10}^{8} } m \\ \\ = > ( \frac{1.275 \times {10}^{3} }{ {10}^{8} } )m \\ \\= > \frac{1.275}{ {10}^{(8 - 3)} } m \\ \\= > \frac{1.275}{ {10}^{5} } m \\ \\= > (1.275 \times {10}^{ - 5} )m\end{lgathered} </p><p>=>0.00001275m=$

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

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

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