NYC is correct. Need all the factors. What we can say however is that if the ball is struck with OPTIMUM launch angle on a windless day in completely average conditions 80mph = about 300 feet. I see 2019's chart says 275. There are different charts with different results but 80=300 is the most common I have seen. Then its five feet for every MPH from there. so 90 = 350 feet and 100 = 400 feet. A little helping breeze can affect those numbers more than you think. Thus you may see a MLB game where they are measuring all that and see a 100mph exit velo and a 412 foot distance. If you are super interested in all this stuff I would suggest looking into Dr. Alan Nathan and his baseball physics website.