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In standard form 21600000 is written as

  • a)
    2.16 × 107

  • b)
    216 × 107

  • c)
    2.16 × 105

  • d)
    216 × 100000 

Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In standard form 21600000 is written asa)2.16 × 107b)216 ×...
There are 7 digits after 2 . So , 10 power 7 . Now , after 7 digits from o put a decimal point . That's why 21600000 is written as 2.16 * 10 raise to power 7
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Community Answer
In standard form 21600000 is written asa)2.16 × 107b)216 ×...
count from rigth to left till you get last non-zero number 
like here 2 is the last non-zero number and for it we have to count 7 times
then write 2.16x 107
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In standard form 21600000 is written asa)2.16 × 107b)216 × 107c)2.16 × 105d)216 × 100000Correct answer is option 'A'. Can you explain this answer?
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