Answered

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HELP PLZ WILL GIVE BRAINLEST!!

If the height of an object is thrown upward at an initial velocity of 112 ft per sec the height after t
seconds is 112t-16t2. Find the number of seconds it takes to hit the ground.
7 Sec
3.5 sec
56 sec
112 sec

Sagot :

Trancescient

Answer:

7 seconds

Step-by-step explanation:

You gave the height formula at any time t as

h = -16t^2 + 112t

when the object hits the ground, that means that h = 0. Putting this value in the equation above, we get

-16t^2 + 112t = 0 --> -16t + 112 =0

Solving for t, we get

t = 112/16 = 7 seconds

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