Practice!

Sample Problem

What is (8.5 ×107)(1.2×103 )? Use correct scientific notation

Solution

In scientific notation, you move the decimal place until you have a number between 1 and 10. Then you add a power of ten that tells how many places you moved decimal.

(8.5 ×107)(1.2×103 )

= (8.5×1.2)(107×103)

= 10.2×1010

= 1.02×1011