Question

8) Jack was fishing on a bridge and caught a fish that was 7 feet below sea level. He reeled up 20 feet to where he was on the bridge. How many feet above sea level was the bridge?

Answer 1

So this is graphically the situation given in the problem, and they ask us to calculate how many feet above sea level was the bridge?​ it will be easy to find only by subtracting 7 from 20 like we see in the graph. So there are 13 ft between the bridge and the sea level.

in this example we see the importance of drawing the physical situation, to clarify the information in our minds.