Question

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

Answer 1

how many zeros in a billion?

Answer 2

8.1 x 10^(-10) if theres 9 zeros in it

Answer 3

and forget the - part lol

Answer 4

8.1 x 10^(10) if theres 9 zeros in it

Answer 5

it depends....
if you live at USA, one billion has 9 zeros: 1,000,000,000
but anywhere else one billion has 12 zeros: 1,000,000,000,000 (with nine zeros is called one thousand million)