Which equation would best help solve the following problem?

Martina hits a volleyball ball upward with an initial velocity of 13 meters/sec. When she hits the ball, it is one meter above the ground. How long will it take the ball to hit the ground?

A.

–4.9t2 + 13t + 1 = 0

B.

–4.9t2 + 13t = 1

C.

4.9t2 + 13t + 1 = 0

D.

–16t2+ 13t + 1 = 0

@Dscdago

Question

Which equation would best help solve the following problem?

 

Martina hits a volleyball ball upward with an initial velocity of 13 meters/sec. When she hits the ball, it is one meter above the ground. How long will it take the ball to hit the ground? 
 
 
 

 
 

  

  A. 
 
–4.9t2 + 13t + 1 = 0
   
   

 
 

  

  B. 
 
–4.9t2 + 13t = 1
   
   

 
 

  

  C. 
 
4.9t2 + 13t + 1 = 0
   
   

 
 

  

  D. 
 
–16t2+ 13t + 1 = 0
 
@Dscdago

anonymous · Answer

A?

anonymous · Answer

It's B. I don't know how to explain, but I found this from another question here. http://openstudy.com/study#/updates/5362c116e4b02f72432c0025