Q110 of 196 Page 249

Some migratory birds travel as much as 15,000 km to escape the extreme climatic conditions at home. Write the distance in metres using scientific notation.

The distance travelled by birds = 15,000 km

∵ 1 km = 1000 m

∴ 15,000 km = 15000 × 1000 m

= 15000000 m

= 15 × 10⁶ m

= 1.5 × 10⁷ m

∴ The distance in metres is 1.5 × 10⁷ m

108

Express the product of 3.2 × 10⁶ and 4.1 × 10^–1 in the standard form.

109

Express in the standard form.

111

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112

Special balances can weigh something as 0.00000001 gram. Express this number in the standard form.