Jennifer ran 2.8 mi Convert this distance to kilometers. Round t0 the nearest tenth Provide your answer below:
The Correct Answer and Explanation is:
Correct Answer:
Jennifer ran 4.5 kilometers (rounded to the nearest tenth).
Explanation
To convert miles to kilometers, we use a standard conversion factor:
1 mile = 1.60934 kilometers
Jennifer ran 2.8 miles. To convert this to kilometers, we multiply 2.8 by 1.60934:2.8×1.60934=4.50615 kilometers2.8 \times 1.60934 = 4.50615 \text{ kilometers}2.8×1.60934=4.50615 kilometers
Now, we round 4.50615 to the nearest tenth. The tenths place is the first digit after the decimal, which is 5. The number after that is 0, which means we do not round up, because it is less than 5. So:4.50615≈4.5 kilometers (to the nearest tenth)4.50615 \approx 4.5 \text{ kilometers (to the nearest tenth)}4.50615≈4.5 kilometers (to the nearest tenth)
Why This Matters
Understanding unit conversions is a key part of working with measurements, especially when switching between systems like U.S. customary units and the metric system. In many parts of the world, distance is measured in kilometers, while in the United States, miles are more common.
Let’s break it down:
- If you’re running a race or tracking your workout internationally, your running app or smartwatch might show kilometers.
- Knowing how to convert helps compare performance or follow directions in unfamiliar measurement systems.
- In science and math, consistent units are important for accuracy, so conversions like this are routine.
In this problem, Jennifer ran 2.8 miles, which is a bit over a typical 5K race (which is about 3.1 miles or 5 kilometers). By converting to kilometers, we can see she ran almost 90% of a 5K.
Final Answer:
4.5 kilometers (rounded to the nearest tenth).
