Question

What is exponential notation of 129?

Answer 1

Answer:

Why is 129 written as 1.29 x 102 in scientific notation? The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

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Answer 2

Answer:

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 129 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: 129

New Number: 1.29

Step 2

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

New Number: 1 . 2 9

Decimal Count: 1 2

There are 2 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 = 1.29

b = 2

Now the whole thing:

1.29 x 102

Step 4

Check your work:

102 = 100 x 1.29 = 129

More Scientific Notation Examples

127 128 130 131

1.27 x 102 1.28 x 102 1.3 x 102 1.31 x 102

Step-by-step explanation:

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