Kathy stood on the middle rung of a ladder. she climbed up 5 rungs, moved down 3 rungs, and then climbed up 7 rungs. then she climbed up the remaining 2 rungs to the top of the ladder. how many rungs are there in the whole ladder?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance