Scientific Notation

The half-life of Uranium is 2.5 x 10⁵ years. What is this in standard form?

• 2500000

• 250

• 25000

• 250000

Write 4.83 x 10^-6 in Standard Form.

• 0.00048300

• 0.00004830

• 0.00000483

• 0.00000438

Convert 0.0000037 to Scientific Notation.

• .37 x 10^-7

• 3.7 x 10^-6

• 37 x 10^-5

• 370 x 10^-4

Mercury’s average distance from the sun is 57,190,000 km. What is the distance in scientific notation?

• 5719 x 10⁴

• 571.9 x 10⁵

• 57.19 x 10⁶

• 5.719 x 10⁷

(3 x 10⁷)(3.1 x 10^-4)

• 9.3 x 10^-28

• 9.3 x 10³

• 6.1 x 10³

• 6.1 x 10^-28

• 2.1 x 10⁶

• 2.1 x 10^-6

• 9.9 x 10⁶

• 9.9 x 10^-6

The thickness of a human hair can be about 6 x 10^-3 centimeters. Which shows this thickness in standard form?

• 6000 cm

• 0.06 cm

• 0.006 cm

• 0.0006 cm

The speed of light is about 300 million meters per second. Which expression shows this speed in scientific notation?

• 300 x 10⁶

• 300 x 10^-6

• 3 x 10⁸

• 3 x 10^-8

To travel from Earth to Saturn, the craft needs to travel a total distance of 1.4 x 10⁹ km. A spacecraft leaves Earth’s orbit at a speed of 7 x 10⁵ km per day. How long will it take the spacecraft to reach Saturn? Express your answer in correct scientific notation.

• 2 x 10⁴

• 0.2 x 10⁴

• 2 x 10³

• 0.7 x 10⁴

There are approximately 3.1 x 10⁸ people in the United States. If on average each person has 4.1 x 10¹ coins lying around on dressers, in pockets, in cars, etc., how many total coins do all the people in the U.S. have?

• 127.1 x 10⁸

• 12.71 x 10⁹

• 1.271 x 10¹⁰

• .1271 x 10¹¹