The first windsurfer is travelling faster. Solution:
1 meter = 3.28084 feet
The first surfer travels at 5 meters/second so you have to multiply 3.28084 by 5 which equals 16.4042 ft/second
There are 60 seconds in a minute so you will have to multiple 16.4042 ft/second by 60 seconds which equals 984.252 ft/minute
984.252 ft/minute > 720 ft/minute
20 is the answer to the question you asked.
The answer is simple:
Just add the two populations together.
100,500 + 78,400 = 178,900
ANSWER: A. 178,900
Hope this helps! Have a good night and God bless (: