The correct answer between all the choices given is the second choice, which is 1.15 seconds. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.
Answer:
The ball will take 1.15 seconds to hit the floor.
Explanation:
It is given that,
A juggler is performing her act using several balls. The height as a function of time is given by :
[tex]h(t)=-16t^2+vt+s[/tex].............(1)
where
v is the speed of the ball
s is initial height
t is time taken
Putting h(t) = 0 and solving equation (1)
[tex]-16t^2+vt+s=0[/tex]
[tex]-16t^2+15t+4=0[/tex]
On solving above equation using graphing calculator and solving for t we get, t = 1.154 seconds
Hence, the correct option is (b) " 1.15 seconds ".
