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The extracted text is incomplete and somewhat garbled, but I can interpret the visible parts of the problem and solution process. 

The problem asks to use the formula \( D = \frac{t}{3} \) to estimate the number of seconds (\( t \)) between seeing the lightning and hearing the thunder if the storm is 1.2 km away.

Given:
\[ D = 1.2 \text{ km} \]

Using the formula:
\[ D = \frac{t}{3} \]

We can solve for \( t \):
\[ 1.2 = \frac{t}{3} \]
\[ t = 1.2 \times 3 \]
\[ t = 3.6 \text{ seconds} \]

So, if the storm is 1.2 km away, you should count 3.6 seconds between seeing the lightning and hearing the thunder.

Would you like more details or have any questions? Here are some related questions you might find interesting:

1. How does the speed of sound vary with temperature?
2. Why do we see lightning before we hear thunder?
3. What factors can affect the accuracy of this distance estimation?
4. How can you convert the distance from kilometers to miles?
5. What other methods can be used to measure the distance to a thunderstorm?

**Tip:** Practicing with various distances and times can help reinforce your understanding of the relationship between time, distance, and the speed of sound.

Learn how to estimate the distance to a thunderstorm using the speed of sound formula. This problem involves applying the formula D = t/3 to calculate the time interval between seeing lightning and hearing thunder, given a distance of 1.2 km. Suitable for students in Grades 6-8.

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