ANSWER: Given: u(initial velocity)=4m/s a(acceleration)=80m/s^2 t(time)=1.8seconds To find final velocity denoted by v- We will use first derivation of motion. v=u+at v=4+(80)(1.8) v=4+144 v=148m/s^-1 or 144m/s HOPE IT HELPS!!!!!! PLEASE MARK BRAINLIEST!!!!!