Introduction to Units

Practice: The earth’s circumference is approximately 40.1 Mm (megameters). What is this circumference in kilometers?

Practice: Astronomers often detect radio waves with wavelengths of 3,000,000,000 nm. What is this wavelength expressed in decameters (dam)?

Practice: Rewrite 0.00016 kg in scientific notation.

Practice: Rewrite 299,800,000 m/s in scientific notation.

Practice: Rewrite 3.41 × 10⁻⁴ in standard form:

Practice: Rewrite 9.98 × 10⁷  in standard form.