Question

During an experiment, Ellie records a measurement of 0.00000225 m. How would she write her measurement in scientific notation?

a. 2.25 × 10^-6 m
b. 2.25 × 10^-5 m
c. 2.25 × 10^-7 m
d. 2.25 × 10^-8 m

Answer 1

Ellie's measurement of 0.00000225 m in scientific notation is 2.25 × 10^-6 m.

Step-by-step explanation:

To convert the measurement of 0.00000225 m to scientific notation, Ellie needs to move the decimal point six places to the right so that the number is now 2.25. Since the decimal was moved six places, the exponent will be -6. Hence, the measurement in scientific notation is 2.25 × 10-6 m.

So, the correct answer to Ellie's question is a. 2.25 × 10-6 m.