If charles rides 4 miles in 20 minutes on his bike, which ratio shows the number of miles per minute he can ride

If Charles rides 4 miles in 20 minutes then we can determine the mpm (Miles per Minute) from his imperial. 4miles/20 minutes would equal x miles/1 minute. From this we can solve for x by simply taking 4 miles and dividing it by 20 to get the mpm. In this case the mpm is .2 or 1056 feet. Hope this helps! :)