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0
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Help Please

 Dec 9, 2018

Best Answer 

 #2
avatar+15350 
+2

d= kt^2

80 = k (4)^2

k=5

 

d=(5)(t^2)   in the first TWELVE SECONDS

d = 5(12^2) = 720 m   

     MINUS the distance it fell in the FIRST 4 seconds 

          720 - 80 = 640 m

 Dec 10, 2018
 #1
avatar+72 
+1

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
avatar+15350 
+2
Best Answer

d= kt^2

80 = k (4)^2

k=5

 

d=(5)(t^2)   in the first TWELVE SECONDS

d = 5(12^2) = 720 m   

     MINUS the distance it fell in the FIRST 4 seconds 

          720 - 80 = 640 m

ElectricPavlov Dec 10, 2018

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