Final answer:
The question as formulated '3 miles in 28 minutes: 33 3 miles in x minutes' lacks clear context, but generally, to calculate time based on speed and distance, divide the total distance by the speed. Understanding units and conversion factors is critical for these kinds of problems. Thus, solving similar problems involves using ratios or the formula time = distance/speed. option B is correct.
Step-by-step explanation:
If a student runs 3 miles in 28 minutes and wants to find an equivalent rate at which they would run the same distance in x minutes, we can set up a proportion based on the concept of speed, which is distance over time. The student's question seems to imply an equation where a given distance is being covered in a varying amount of time, but unfortunately, the question itself seems to be incomplete or incorrectly formulated as '3 miles in 28 minutes: 33 3 miles in x minutes' doesn't provide a context to solve for x directly.
However, related examples can be used to understand how to solve such problems. For instance, if a marathon runner averages 9.5 mi/h and needs to run a 26.22 mi marathon, the time taken can be calculated. Time = Distance/Speed, so it would take (26.22 miles) / (9.5 miles/hour) which is approximately 2.76 hours or 2 hours, 45 minutes, and 36 seconds.
To find out the total distance a runner covers when running multiple segments, simply add up the distances. If a runner goes 9.5 miles, then 8.89 miles, and finally 2.333 miles, the total distance would be 9.5 + 8.89 + 2.333, which is 20.723 miles, and should be reported using the correct number of significant figures.