Answer:
find the number of seconds it takes for the object to reach the ground, we can set the equation for the height of the object, h=-16t+324, equal to zero. This is because when the object reaches the ground, its height will be zero.
So, we have:
-16t+324=0
To solve for t, we can subtract 324 from both sides of the equation:
-16t=-324
Then, we divide both sides of the equation by -16:
t=(-324)/(-16)
Simplifying the equation gives us:
t=20.25
Therefore, it will take approximately 20.25 seconds for the object to reach the ground.
Explanation: