Example 2 Multiple Choice Practice The thickness of the wall of a soap bubble is about meter. What is the thickness written in scientific notation? 10 –7 m  410 –6 m  4 10 –5 m  m  4 Product form  4 Scientific notation Exponent is 6.6. – 10 –6  4 SOLUTION Standard form Move decimal point 6 places to the right

Example 2 Multiple Choice Practice ANSWER The correct answer is B. The thickness of the wall of the bubble is about meter. 10 –6  4

Guided Practice for Example 2 Write the number in scientific notation ANSWER 10 –3  ANSWER 10 –6  5.26 ANSWER 10 –9  ANSWER 10 –2  2.37

Guided Practice for Example 2 Write the number in scientific notation ANSWER 10 –5  ANSWER 10 –4  3.041