Q: How is the number 72,778,665 written in Scientific Notation?

 A: 7.2778665 x 107

Why is 72,778,665 written as 7.2778665 x 107 in scientific notation?

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 72,778,665 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: 72,778,665
  • New Number: 7.2778665

Step 2

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

New Number: 7.2778665
Decimal Count: 1234567

There are 7 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 = 7.2778665

b = 7

Now the whole thing:

7.2778665 x 107

Step 4

Check your work:

107 = 10,000,000 x 7.2778665 = 72,778,665


More Scientific Notation Examples

72,778,66372,778,66472,778,66672,778,667
7.2778663 x 1077.2778664 x 1077.2778666 x 1077.2778667 x 107

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