https://file.aiquickdraw.com/mathbot/file/1728563123432r9l9bzj3.jpg

The expression to evaluate is:

\[
(7.2 \times 10^{-6}) + (5.44 \times 10^{-6})
\]

Since both terms are in the same power of \(10^{-6}\), we can simply add the coefficients:

\[
7.2 + 5.44 = 12.64
\]

So the sum is:

\[
12.64 \times 10^{-6}
\]

To express this in proper scientific notation, we write it as:

\[
1.264 \times 10^{-5}
\]

Thus, the final answer in scientific notation is:

\[
1.264 \times 10^{-5}
\]

Would you like further details or have any questions?

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Here are 5 related questions to practice with:

1. Evaluate \((3.1 \times 10^{-4}) + (2.5 \times 10^{-4})\).
2. Add \((6.7 \times 10^{-3})\) and \((3.4 \times 10^{-3})\) in scientific notation.
3. Subtract \((8.56 \times 10^{-5}) - (3.14 \times 10^{-5})\).
4. Multiply \((4.2 \times 10^2) \times (3.1 \times 10^{-3})\).
5. Divide \((5.6 \times 10^{-2}) \div (2.0 \times 10^{-1})\).

**Tip**: When adding or subtracting in scientific notation, ensure that the powers of ten are the same before performing the operation on the coefficients.

Learn how to add numbers in scientific notation, focusing on the problem (7.2 × 10^(-6)) + (5.44 × 10^(-6)). This solution covers the addition of coefficients and explains how to express the result in proper scientific notation. Suitable for Grades 9-11 students.

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