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mustafakhalil02
17.01.2020 •
Mathematics
If an object is dropped from a height of 256 feet, the function h(t)=-16t^2+256 gives the height of the object after t seconds. when will the object hit the ground?
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Ответ:
The object will hit the ground after 4 seconds
Step-by-step explanation:
Hi, when the object hits the floor the height h (t) is equal to 0.
So, to answer this we have to solve for t substituting h(t)=0
h(t)=-16t^2+256
replacing:
0= -16t^2+256
Solving for t:
16t^2= 250
t^2 = 250/16
t = √15.625
t= 3.95 ≅4 seconds
Feel free to ask for more if needed or if you did not understand something.
Ответ:
8 mi = 12.8 km