Answer:
4
Step-by-step explanation:
d=2
-6+22
16 square rooted
0=44-25t-5t^2
t^2+2t-8=0
(t+4)(t-2)=0
t=-4 (not a solution) or t=2
Answer: after 2 seconds
1, 3, 4 i hope this helps ;)