12). 600,000,000 = _____________ |
13). 4,200,000 = ______________ |

14). 800 = _____________ |
15). 14 = ______________ |

16). 6 x 10 = ^{4}_____________ |
17). 4 x 10 = ^{8}______________ |

[Extra Credit]:

Scientific notation is used in science to describe really big and really small numbers. Here are some scientific facts. Write the numbers as regular numbers (with zeroes ). Write small.

18).

4 x 10

19).

1.5 x 10