Find the mode: 22, 19, 15, 16, 18, 18, 5, 18

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 is the missing step in this proof ?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a