Question

The length of the Amazon River in

South America is 6, 400
kilometers. What is the length
written in scientific notation?

Answer 1

6.4*10³

Explanation:

Divide 6,400 by 1,000 to get 6 into the ones place.

6,400/1000=6.4

1000 is 10*10*10 so use an exponent to simplify it.

10³

multiply the two products

6.4*10³