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ijohnh14

Calculating scientific notation for a positive integer is simple, as it always  follows this notation: a x 10^b

Follow the steps below to see how 102,800,000 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

Original Number: 102,800,000
New Number: 1.02800000

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number: 1.02800000
Decimal Count:1 2 3 4 5 6 7 8

There are 8 places to the right of the decimal place.

Step 3

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

Remember, the notation is: a x 10^b

a = 1.028 (Please notice any zeroes on the end have been removed)

b = 8

Now the whole thing:

1.028 x 10^8

Step 4

Check your work:

108 = 100,000,000 x 1.028 = 102,800,000

Hope this helps! :)
The answer is B because when you write it in a scientific notation, you have to count to the left up to the last zero. For example, since the number is 102,800,000 you have to count the numbers to the left up to the last zero the number will now be 1028. But now you have to write it as 1028X10 to the fifth power because there were 5 zero’s to move.

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