Question

Does anyone get this? please, i'm desperate for help and would appreciate it :)

Answer 1

Hello 

the answer to this is going 
to be 

0.9 sec

hope this helps 

have a good day 

I'm out

Answer 2

H=-16t² -8t +20
when basketball hit the ground h=0
-16t²-8t+20=0
4t²+2t-5=0

D=b²-4ac =4+4*4*5=84
t= (-b +/-√D)/2a
t=(-2+√84)/(2*4)=0.9 sec