Answer:
70 m/s
Explanation:
It should be 70m/s since if the baseball is treling 30m/s (let's say for west) and the bat hits the baseball making it traveling east 40m/s (speed). If it is in velocity then we can say 30m/s is positive or negative, your preference, and then the velocity of (40m/s speed) will become the opposite of that. All you need to do is add the absolute value of both sides to get your answer: 70 m/s