How do i find the displacement??

Question

An automobile with an initial speed of 3.89 m/s accelerates uniformly at the rate of 3.55 m/s2. Find the displacement after 4.15 s.

 

(I already have my answer i just want to make sure i got it correct)

Answer 1

d = (1/2)at² + vt = [(1/2)(3.55)(4.15)² + (3.89)(4.15)] m = 46.71 m