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Help Please

 Dec 9, 2018
 #1
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Because it is proportional to the respected numbers square. 4^2=16 and because it is proportional 80/16=5. We have to square 8 to get 64 and then multiply that value by 5 to get 320. 

 Dec 9, 2018
 #2
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\(d\; \alpha\; t^2\\ d=kt^2\\ find\;k\\ 80=k*4^2\\ k=5\\ d=5t^2\\ after\;12\;sec\\ d=5*12^2\\ d=720m\\ 720-80=640 \)

 

 

So in the next 8 sec the ball will drop 640m

 Dec 9, 2018

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