Scientific Notation

The speed of light in a vacuum is 299 792 458 m/s. How is this number written in Scientific Notation?

• 0.299 792 458 × 10⁹ m/s

• 2.997 924 58 × 10⁸ m/s

• 29.979 245 8 × 10⁷ m/s

• 2.997 924 58 × 10⁹ m/s

The speed of sound in dry air at 20° C (68° F) is 1.236 × 10³ km/h. What is the speed of sound written as an ordinary number?

• 12360 km/h

• 1236 km/h

• 123.6 km/h

• 12.36 km/h

Photocopy paper is packaged in reams (500 sheets). The thickness of the pack is 41 mm. What is the thickness of one sheet of paper written in Scientific Notation using meters?

• 8.2 × 10^-2 m

• 8.2 × 10^-3 m

• 8.2 × 10^-4 m

• 8.2 × 10^-5 m

Write 3.56 × 10¹¹ as an ordinary number.

• 3,560,000,000

• 35,600,000,000

• 356,000,000,000

• 3,560,000,000,000

The length of a bacterium is about 4 × 10^-5 inch.What is the length of a bacterium written as an ordinary number?

• 0.0004 inch

• 0.00004 inch

• 0.000004 inch

• 0.0000004 inch