Question

A spaceship traveled 81 billion miles. In scientific notation that is _____ miles.

8.1 × 10 10
8.1 × 10 -9
8.1 × 10 9
8.1 × 10 -10
plz help it's being timed

Answer 1

8.1 × 10^10

:)

Answer 2

A (8.1 x 10^10)

Explanation:

1. 1 billion is 1,000,000,000 or 10^9

2. 81 Billion should be 81 x 10^9, but the correct notation should always show a single digit number, so you need to also divide 81 per 10

3. Thus, the answer is 8.1 x 10^10