Answer

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**Hint:**In this numerical we have to convert the given number into the form of scientific rotation. It means that we have to show it in the form of power of the ten.

As in the given number, the first digit is greater than one, therefore we have to shift the zeros to the right side.

Continue the shifting the zeroes until the result becomes less than $10.$

**Complete step by step solution:**

Given that, there is a number which is $250$ millions.

We have to write it in the form of scientific rotation.

The number $250$ million can be written in digits as $250,000,000.$

Now, for converting it into the scientific form we have to shift one digit to the right side until the result becomes less than $10.$

And this will become the power of $10$ which is used for exponent.

This is shown below:

$250,000,000=2.5\times {{10}^{8}}$

**Additional Information:**

Scientific rotation means it expresses or converts very large or small numbers into the power of ten.

This is the most reliable method to express a large method in a smaller way and also it is easy to understand.

As the name indicates, it is basically used in science because in this subject we encountered so many large values and numbers.

For making it simple and understanding it quietly used in it.

For writing the scientific rotation you must hate the knowledge of decimal points as where to place and when to place.

**Note:**In scientific rotation, always remember that for positive power we have to move the decimal point to the right side.

Whereas, for negative power we have to move the decimal point to the left side.

It means that, when the given number is greater than one we have to shift the zeroes at the right side which becomes positive power.

And when the given number is less than one. We have to shift the zeros at left side which becomes negative power,

For example,

$1324.5=1.3245\times {{10}^{3}}$

$0.00013245=1.3245\times {{10}^{-4}}$

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