# Selected Topics in Contemporary Astronomy and Space Science

## CONTENTS OF CURRICULUM UNIT 98.06.10

## Astronomy and Your Place in the World

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## Reinforcement of Numbers to a Power

2.) What is the rule to put a number into scientific notation?

3.) Change the following into scientific notation:

93,000,000 mi. = .00003 cm =

4.) State the rule for addition/subtraction of a number to a power -

5.) Add or subtract the following:

3 x 10^7m + 17 x 10^6m =

5 x 10^6au - 30 x 10^5au =

6.) State the rules for multiplication of a number to a power -

7.) Multiply the following:

( 40 x 10^2m) x (7 x 10^3m) =

( 30 x 10^18m) x ( 2 x 10-5m) =

8.) State the rule for division of a number to a power -

9.)Divide the following:

(40 x 10^5m) x (3 x 10^2N) =

(5 x 10^2 sec)