https://file.aiquickdraw.com/mathbot/file/1726735551281qks4jll8.jpg

The problem in the image asks to find the total mass of 15 particles, each with a mass of \( 0.26 \times 10^{-25} \) grams.

To find the total mass, you multiply the mass of one particle by the number of particles:

\[
\text{Total mass} = 15 \times \left( 0.26 \times 10^{-25} \right)
\]

First, calculate \( 15 \times 0.26 \):

\[
15 \times 0.26 = 3.9
\]

Now multiply this result by \( 10^{-25} \):

\[
\text{Total mass} = 3.9 \times 10^{-25} \, \text{grams}
\]

Thus, the total mass is \( 3.9 \times 10^{-25} \) grams.

It looks like the answer is option **A**.

Would you like further details or explanations? Here are some related questions:

1. How do you multiply numbers in scientific notation?
2. What is the significance of the exponent in scientific notation?
3. Can you explain why we multiply the mass of one particle by the number of particles?
4. What are some common uses of scientific notation in real life?
5. How do you handle large or small numbers in different unit systems?

**Tip:** When working with scientific notation, handle the coefficients and exponents separately to avoid confusion.

Jisim bagi suatu zarah ialah 0.26 × 10^-25 g. Carikan jumlah jisim dalam g, bagi 15 zarah.

Learn how to calculate the total mass of 15 particles, each with a mass of 0.26 × 10^-25 g, using multiplication and scientific notation. This problem covers key concepts in scientific notation and is suitable for students in Grades 9-10.

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