1. Example 2 Multiple Choice Practice The thickness of the wall of a soap bubble is about 0.000004 meter. What is the thickness written in scientific notation? 10 –7 m  410 –6 m  4 10 –5 m  4010 7 m  4 Product form 0.000001  4 Scientific notation Exponent is 6.6. – 10 –6  4 SOLUTION Standard form Move decimal point 6 places to the right. 0.000004

2. 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

3. Guided Practice for Example 2 Write the number in scientific notation. 0.00475 ANSWER 10 –3  4.75 8. 0.00000526 9. 0.0000000082 10. ANSWER 10 –6  5.26 ANSWER 10 –9  8.2 0.0237 11. ANSWER 10 –2  2.37

4. Guided Practice for Example 2 Write the number in scientific notation. 0.000097 ANSWER 10 –5  9.7 12. 0.0003041 13. ANSWER 10 –4  3.041