Question

The distance from Earth to the moon is 384,400 kilometers. What is this distance expressed in scientific notation?

a. 3.844 × 10⁵ kilometers
b. 3.844 × 10⁶ kilometers
c. 3.844 × 10⁻⁶ kilometers
d. 3.844 × 10⁻⁵ kilometers

Answer 1

The distance from Earth to the moon, 384,400 kilometers, can be expressed in scientific notation as 3.844 × 10^5 kilometers. Option number a is correct.

Step-by-step explanation:

The distance from Earth to the moon is 384,400 kilometers. To express this distance in scientific notation, we can write it as 3.844 × 105 kilometers.

So, the correct answer is a. 3.844 × 105 kilometers.

In scientific notation, numbers are expressed in the form of a × 10n, where a is a number between 1 and 10 (excluding 10), and n is an integer representing the number of places the decimal point must be moved to have the original number.