Question

a red blood cell is about 0.0000081 meters in diameter. select the best estimate for 0.0000081. 0.000008 0.0000008 0.000009 0.0000009 write your estimate as the product of a 1 - digit number and an integer power of 10. 0.0000081 ≈ × 10

Explanation:

Step1: Identify the closest estimate

The number 0.0000081 is closer to 0.000008 than to 0.000009.

Step2: Convert to scientific - notation

To write 0.000008 in scientific - notation, we move the decimal point 6 places to the right. So, $0.000008 = 8\times10^{-6}$.

Answer:

0.000008; $8\times10^{-6}$