Question

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Add Numbers in Scientific Notation Quick Check
1 of 51 of 5 Items
Question
Add 7.3×107+1.8×107
. Which is the correct sum?(1 point)
Responses

9.1×1014
9.1 times 10 superscript 14 baseline

8.1×107
8.1 times 10 superscript 7 baseline

9.1+107
9.1 plus 10 superscript 7 baseline

9.1×107

Answer 1

To add the numbers in scientific notation, you simply add the coefficients and keep the same power of ten.

Given:
- \( 7.3 \times 10^7 \)
- \( 1.8 \times 10^7 \)

You add the coefficients (7.3 and 1.8):

\[
7.3 + 1.8 = 9.1
\]

Since both terms have the same power of ten (\(10^7\)), you keep that:

So, the sum is:

\[
9.1 \times 10^7
\]

Therefore, the correct response is:

**9.1×10^7**