To determine the speed in miles per hour (mph), we first need to find out how many miles Camden can run in one hour.
Since Camden can run 1/2 of a mile in 1/8 of an hour, we can calculate the distance he can run in one hour by multiplying the distance by 8.
1/2 mile * 8 = 4 miles
Now, we know that Camden can run 4 miles in one hour. Therefore, his speed in miles per hour (mph) is 4 mph.