Question

write in scienticfic notation. 81900​

Answer 1

Answer:

8.19×10^4

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Answer 2

Step-by-step explanation:

The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

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

a x 10b

Follow the steps below to see how 81,900 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: 81,900

New Number: 8.1900

Step 2

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

New Number: 8 . 1 9 0 0

Decimal Count: 1 2 3 4

There are 4 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 10b

a = 8.19 (Please notice any zeroes on the end have been removed)

b = 4

Now the whole thing:

8.19 x 104

Step 4

Check your work:

104 = 10,000 x 8.19 = 81,900