1. Example 1 Writing a Number in Scientific Notation Joseph King used 110,000 toothpicks to make his Eiffel Tower model. To write 110,000 in scientific notation, use powers of 10. ART Product form 5 zeros 100,000  1.1 Scientific notation Exponent is 5. 10 5  1.1 Standard form Move decimal point 5 places to the left. 110,000 ANSWER Joseph King used toothpicks to make his model. 10 5  1.1

2. Guided Practice Write the number in scientific notation. for Example 1 4000 ANSWER 10 3  4 1. 7,300,000 2. 63,000,000,000 3. ANSWER 10 6  7.3 ANSWER 10  6.3 230,000 4. ANSWER 10 5  2.3

3. Guided Practice Write the number in scientific notation. for Example 1 2,420,000 ANSWER 10 6  2.42 5. 105 6. ANSWER 10 2  1.05 REASONING Write the number 3 in scientific notation. 7. 10 7  30 ANSWER 10 8  3