The sides could be 1,14 or 2,7
Answer:

Step-by-step explanation:

Don't mind the 
I believe it’s X = 4
So 4 would be the answer
Answer:
initial velocity = 64 m/s
Step-by-step explanation:
Differentiate H = 64t - 16t² to find an equation for velocity:
Velocity =
= 64 - 32t
Initial velocity (u) is when t = 0:
u = 64 - 32(0)
⇒ u = 64 - 0
⇒ u = 64 m/s