A ball gets kicked from the ground, and the equation that models the height of the ball (measured in metres) versus time (measured in seconds) is given by h(t) = -4.9t2 +12.8t. How long is the ball in the air, to 2 decimal places, before it hits the ground?
graph it

MFG Graphing Parabolas - Yoshiwara Booksyoshiwarabooks.org › mfg › Graphing-Parabolas

Some parabolas are shown below. ... This high or low point is called the vertex of the graph. ... Points where the parabola intersects the [Math Processing Error] x -axis are called the ... For a soccer ball kicked from the ground, these functions are ... of the ball t seconds after its release would be given in meters by the function.

Step-by-step explanation:

it is 10.6 according to my calculations

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches