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Q.

Express the following number in the standard form.


5,00,00,000


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a

    5× 10 5

b

    5× 10 7

c

   5× 10 8

d

    5× 10 −7  

answer is B.

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Detailed Solution

Given number is 5,00,00,000.
Decimal point should be placed after the leftmost digit.
Determine how many digits are left once the decimal point has been relocated.
The expression should be written in standard form.
Understand that, the decimal point is moved 7 places to the left.
Thus, the standard form of number 50000000 is 5× 10 7 .
Therefore, the correct option is 2.
 
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