Aboy throws a ball straight up into the air it reaches of the highest point of its flight after 4 seconds how fast was the ball going when it left the boy's hand

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your