Sarah kicked a ball in the air. The function
f
ff models the height of the ball (in meters) as a function of time (in seconds) after Sarah kicked it.

The ball hits the ground at 5 s

Step-by-step explanation:

The question seems incomplete and there is not enough data. However, we can work with the following function to understand this problem:

(1)

Where models the height of the ball in meters and the time.

Now, let's find the time when the ball Sara kicked hits the ground (this is when ):

(2)

Rearranging the equation:

(3)

Dividing both sides of the equation by :

(4)

This quadratic equation can be written in the form , and can be solved with the following formula:  

(5)  

Where:  

Substituting the known values:  

(6)  

Solving we have the following result:

 This means the ball hit the ground 5 seconds after it was kicked by Sara.

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s

answer: im gonna go with milli

step-by-step explanation: