Question

The diameter of a human red blood cell is 0.000009 m The diameter of a cold virus is 0.00000003 m. Approximately how many times as large is the diameter of a red blood cell as the diameter of a cold virus?

Answer 1

3*10^2

Explanation:

Answer 2

Red Cell is 300 times larger than the virus

Explanation:

Size in scientific Notation

• Red Cell = 9 * 10^-6
• Virus = 9 * 10^-8

Procedure.

• Count the number of zeros in the decimal
• Red Cell = 5 ; virus = 7
• And one more to each
• Red Cell = 6; virus = 7
• change the numbers to minus
• Red Cell = -6 ; virus = - 7
• The last row is the powers as shown above.

Answer

9*10^-6/3 * 10^-8

3*10^(-6 - - 8)

3*10^(- 6 + 8)

3^10^2 or 300 times larger