Does anybody understand this answer in true or false

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.

Can you simplify 4/7? 24 points will be awarded!

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?