A swim race has a total distance of 22.5 mi. Race officials want to mark the course every 600 yd with a buoy including one at the finish line. (The starting does not need a buoy.) how many buoys are needed?
To find the number of buoys needed, we need to divide the total distance of the race by the distance between each buoy, and then subtract 1 for the starting point since it doesn't need a buoy.
22.5 miles = 22.5 * 1760 yards (1 mile = 1760 yards) = 39,600 yards
Each buoy is placed every 600 yards.
Total number of buoys needed = (Total distance / Distance between each buoy) - 1
Total number of buoys needed = (39,600 yards / 600 yards) - 1
Total number of buoys needed = 66 - 1
Total number of buoys needed = 65
Therefore, 65 buoys are needed for the swim race.