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James threw a ball from the roof of a building. The ball fell 3 feet in the first second, 9 feet in next second, and 27 feet in the third second. Which expression represents the distance the ball fell at the nth second?

A 3n

B 3n

C n3

D 6n-3

 Jan 10, 2018
 #1
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Note

 

31  = 3

 

32  =  9

 

33  =  27

 

So.....

 

3n  appears to model the distance of the fall after n seconds   {Answer A  ]

 

 

cool cool cool

 Jan 10, 2018

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