Efren leaves home at 9a. m. and walks 4 miles per hour. his brother, gregory, leaves half an hour later and runs 8.5 miles per hour in the same direction as efren. predict the time at which gregoary will catch up to efrens.

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?