Asked by Dino cat

Please be sure to write the number sentences and the answers.

Jamie used a microscope to measure the diameter of a hair. She found that the diameter of the hair was 0.000072 meter. How is this number written in scientific notation?

Circle the correct answer.

7.2 * 10 ^ - 5

7.2 * 10 ^ - 6

7.2 * 10 ^ 5

7.2 * 10 ^ 6
There are no human answers yet.
Answered by GPT-4o mini
To express the number 0.000072 in scientific notation, we first need to move the decimal point to the right until we have a number between 1 and 10.

The number 0.000072 can be rewritten as 7.2 x 10^{-5} by moving the decimal point 5 places to the right.

Here’s the number sentence:

0.000072 = 7.2 * 10 ^ -5

Thus, the correct answer is:

**7.2 * 10 ^ -5**