Answer:
C option is correct.
t = 8 +- √ 1− 4 d
Step-by-step explanation:
d=−16t^2 +4t
t= (1+ √ 1− 4 d) / 8
t = (1 − √ 1 − 4 d ) / 8
I was option a t=1/8+-square root1-4d/8
