STAAR Scientific Notation

The mass of a textbook is approximately 0.00165 metric ton. How is this number written in scientific notation?

• 165 x 10^-5

• 1.65 x 10^-3

• 16.5 x 10^-4

• 0.165 x 10^-2

Tags

CCSS.8.EE.A.3

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?

• 7.2 x 10^-5

• 7.2 x 10⁶

• 7.2 x 10⁵

• 7.2 x 10^-6

Tags

CCSS.8.EE.A.3