The 20,000-meter run is a long-distance Olympic race. What is the approximate length of this run in feet? Round off your answer to three significant figures. [1 meter is equal 39.37 inches] A) 6.09 × 10⁴ ft B) 6.562 × 10⁴ ft C) 6.6 × 10⁴ ft D) 6.56 × 10⁴ ft

Question

Quizplus · Accepted Answer

We can start by converting 20,000 meters to feet by multiplying by the conversion factor 39.37 inches/meter and then dividing by 12 inches/foot:
20,000 meters * 39.37 inches/meter / 12 inches/foot = 65,616.798 feet
Rounding this number to three significant figures gives 6.56 × 10^4 ft, which corresponds to choice D.

The 20,000-Meter Run Is a Long-Distance Olympic Race