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Usually only one digit is to the left of the decimal point in scientific notation.

For example, 240 is written as 2.4x10^2 while .00035 would be written as 3.5 x 10^-4.

In some instances, however rare they are, you may see expressions such as 24x10^1 or 35x10^-3, and so on.

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Q: When writing a number in scientific notation how many numbers should be on the left side of the decimal point?
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