8,640,000,000 in scientific notation form

 A: 8.64 x  

Step 1To find a, take the number and move a decimal place to the right one position.
•Original Number: 86,400,000
•New Number: 8.6400000

Step 2Now, to find b, count how many places to the right of the decimal.
New Number:8.6400000
Decimal Count:     1234567
(There are 7 places to the right of the decimal place.)

Step 3Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b
a = 8.64 (Please notice any zeroes on the end have been removed)
b = 7
Now the whole thing:8.64 x  

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