Final answer:
To find out how many kilometers Millie runs a day, multiply the number of miles she runs by the conversion factor from miles to kilometers, which is 1 mile equals 1.61 kilometers, resulting in approximately 9.66 kilometers.
Step-by-step explanation:
The student is looking to convert miles to kilometers. A proportion can be used to find the approximate number of kilometers that Millie runs in a day. Given that we know 1 mile is approximately equal to 1.61 kilometers, the proportion would look like this:
1 mile/1.61 kilometers = 6 miles/x kilometers
To solve for x, we cross-multiply and divide: (1.61 kilometers) × (6 miles) = x kilometers. The resulting equation would be x = 1.61 kilometers × 6 = 9.66 kilometers. Therefore, Millie runs approximately 9.66 kilometers a day.