Find the distance traveled by cargo ships traveling at 30 miles per hour for 3 days.
A. 90 miles
B. 216 miles
C. 2160 miles
D. 720 miles
To find the distance traveled, we can multiply the speed of the cargo ships (30 miles per hour) by the number of hours in three days (3 days * 24 hours/day).
30 miles/hour * (3 days * 24 hours/day) = 30 miles/hour * 72 hours = 2160 miles
Therefore, the distance traveled by the cargo ships is 2160 miles.
The correct answer is C. 2160 miles.