Question

The distance from the sun to Earth is 93 million miles. How do you write the distance in scientific notation?

A)
0.93 x 10 −8


B)
9.3 x 10 7


C)
9.3 x 10 −7


D)
93.0 x 10 6

Answer 1

B) 9.3 x 10^7

Explanation:

93 million miles can be written as

93,000,000

To write a number in scientific notation, we move the decimal point behind the first non-zero digit in the number. This puts it between 9 and 3, making it 9.3.

In order to move the decimal point from the end (after the last 0) to between the 9 and 3, we must move it 7 places. This means the exponent of 10 in scientific notation will be 7.

This makes the answer 9.3x10^7

Answer 2

93, 000, 000 = 9.3 x 10 7