Answer:
6,031 <em>using diameter, not radius</em>

Which rounds closest to
6,031
Speed is expressed as the ratio of distance/time = d/t
in Alex's case, speed = (3.8 miles / 18 minutes)
. . . or simply
3.8/18
200,000 because the numbers in the middle are low
Answer:D
Step-by-step explanation: