Significant Figures and Scientific Notation

How many significant figures? 100,000

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How many significant figures? 2.006

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How many significant figures? 3.50

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How many significant figures? 0.00050

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How many significant figures? 3.20020

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Write the following numbers (and round if necessary) to 3 significant figures: 1,234,000,000

• 1.234 x 10⁹

• 1.23 x 10⁸

• 1.23 x 10¹⁰

• 1.23 x 10⁹

0.0095678212

• 9.57 x 10^-2

• 9.57 x 10⁰

• 9.57 x 10^-3

• 9.57 x 10⁴

Write the following numbers (and round if necessary) to 3 significant figures. 0.0000006563

• 6.56 x 10^-6

• 6.56 x 10^-7

• 6.56 x 10^-8

• 6.56 x 10^-9

Write the following numbers (and round if necessary) to 3 significant figures. 235,755,000,000

• 2.35 x 10¹¹

• 2.358 x 10¹⁰

• 2.36 x 10¹¹

• 2.358 x 10¹¹

Write the following numbers (and round if necessary) to 3 significant figures. 4,815,162,342

• 4.81 x 10⁹

• 4.80 x 10⁹

• 4.185 x 10⁹

• 4.82 x 10⁹