Can I get help with both I’m confused

In the past, professional baseball was played at the astrodome in houston, texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t2 + 45t + 1. will a baseball hit straight up with this velocity hit the roof of the astrodome? use the discriminant to explain your answer.

What could explain what happened when the time was equal to 120 minutes

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?