Exponets

Whenever you have a large number you need to multiply, it makes it easier to read by using exponets.

Examples:
3 to the 2nd power = 3 x 3
3 to the 5th power = 3 x 3 x 3 x 3 x 3

For a bigger example,8 to the 9th power, 8 is called the base and 9 is called the exponent or index.

The number 123,000,000,000 in scientific notation is written as : 1.23 times 10 to the 11th power

Since 1958, radar has been used to measure distances directly by timing a radio signal bounced off another planet. The currently accepted value is
1 AU = 1.49597870×10 to the 8th power km

To convert this to scientific notation, first we write "1.24". But this is not the same number. However, (1.24)(100) = 124, and 100 = 102. Then, in scientific notation, 124 is written as 1.24 × 102.

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