The function relating the height of an object off the ground to the time spent falling is a quadratic relationship. travis drops a tennis ball from the top of an office building 90 meters tall. three seconds later, the ball lands on the ground. after 2 seconds, how far is the ball off the ground? 30 meters 40 meters 50 meters 60 meters

50 meters

Step-by-step explanation: I just finished the pretest

 The ball is 50 m off the ground after 2 seconds

Step-by-step explanation:

Given the function relating the height of an object off the ground to the time spent falling is a quadratic relationship.

Therefore if h=height and t=time then

      ----------(A)

where a,b and c are constants

Apply given conditions

At t=0s h=90 m

=> 90 m = a+0+0

=>a=90 m

Also the ball has been just dropped at t=0 s

=>

=>

For t=0s b = 0

Thus equation (A) is reduced to

At  t= 3 s , h=0 m

Finally we get

Therefore at t= 2.0 s ,

Thus the ball is 50 m off the ground after 2 seconds

what is

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