Solve the following . observing significant figure rules 12miles/3.20hours 4miles/hr 3.75miles/hr 3.8miles/hr 3.750miles/hr

To solve the problem while observing significant figure rules, we need to divide 12 miles by 3.20 hours and express the result with the correct number of significant figures.<br /><br />1. **Identify Significant Figures:**<br /> - The number 12 has 2 significant figures.<br /> - The number 3.20 has 3 significant figures.<br /><br />2. **Perform the Division:**<br /> \[<br /> \frac{12 \text{ miles}}{3.20 \text{ hours}} = 3.75 \text{ miles per hour}<br /> \]<br /><br />3. **Determine the Correct Number of Significant Figures:**<br /> - When dividing, the result should have the same number of significant figures as the measurement with the fewest significant figures. In this case, that is 12 miles, which has 2 significant figures.<br /><br />4. **Round the Result:**<br /> - Round 3.75 to 2 significant figures: 3.8<br /><br />Therefore, the answer, observing significant figure rules, is \(3.8 \text{ miles per hour}\).