(c) Round off the following numbers to the number of decimal places indicated. \( \begin{array}{lll}\text { (1) } & 9,23584 \text { (3 decimal places) } & \text { (2) } 67,2436 \text { (2 decimal places) } \\ \text { (3) } 4,3768534 \text { (4 decimal places) } & \text { (4) } 17,247398(5 \text { decimal places) } \\ \text { (5) } 79,9999 \text { (3 decimal places) } & \text { (6) } 34,27846(4 \text { decimal places }) \\ \text { (7) } 5,555555 \text { (5 decimal places) } & \text { (8) } & 3 \pi \text { (3 decimal places) }\end{array} \)

Certainly! Let's round each of the given numbers to the specified number of decimal places. ### (c) Rounded Numbers: 1. **9.23584** (3 decimal places) - **Rounded:** **9.236** - *Explanation:* The fourth decimal digit is 8 (≥5), so we round the third decimal up from 5 to 6. 2. **67.2436** (2 decimal places) - **Rounded:** **67.24** - *Explanation:* The third decimal digit is 3 (<5), so the second decimal remains unchanged. 3. **4.3768534** (4 decimal places) - **Rounded:** **4.3769** - *Explanation:* The fifth decimal digit is 5 (≥5), so we round the fourth decimal up from 8 to 9. 4. **17.247398** (5 decimal places) - **Rounded:** **17.24740** - *Explanation:* The sixth decimal digit is 8 (≥5), so we round the fifth decimal up from 9 to 10. This affects the fifth decimal place, resulting in an additional zero. 5. **79.9999** (3 decimal places) - **Rounded:** **80.000** - *Explanation:* Rounding up due to the fourth decimal digit being 9 leads to an increase in the whole number. 6. **34.27846** (4 decimal places) - **Rounded:** **34.2785** - *Explanation:* The fifth decimal digit is 6 (≥5), so we round the fourth decimal up from 4 to 5. 7. **5.555555** (5 decimal places) - **Rounded:** **5.55556** - *Explanation:* The sixth decimal digit is 5 (≥5), so we round the fifth decimal up from 5 to 6. 8. **3π** (3 decimal places) - **Calculation:** - \( \pi \approx 3.141592653589793 \) - \( 3\pi \approx 9.42477796076938 \) - **Rounded:** **9.425** - *Explanation:* The fourth decimal digit is 7 (≥5), so we round the third decimal up from 4 to 5. ### Summary Table: | **Problem** | **Original Number** | **Decimal Places** | **Rounded Number** | |-------------|---------------------|--------------------|--------------------| | (1) | 9.23584 | 3 | 9.236 | | (2) | 67.2436 | 2 | 67.24 | | (3) | 4.3768534 | 4 | 4.3769 | | (4) | 17.247398 | 5 | 17.24740 | | (5) | 79.9999 | 3 | 80.000 | | (6) | 34.27846 | 4 | 34.2785 | | (7) | 5.555555 | 5 | 5.55556 | | (8) | 3π ≈ 9.42477796076938| 3 | 9.425 | If you have any further questions or need additional explanations, feel free to ask!