J Jcc New member Joined Feb 7, 2012 Messages 1 Feb 7, 2012 #1 Recently tried to solve this problem below: A person throws a ball into the air. The height (in feet) f(t) of the ball after t seconds is given by f(t)=-16t2+64t+4. a. When is the ball at a height of 4 feet? Explain why there are two such times.
Recently tried to solve this problem below: A person throws a ball into the air. The height (in feet) f(t) of the ball after t seconds is given by f(t)=-16t2+64t+4. a. When is the ball at a height of 4 feet? Explain why there are two such times.
W wjm11 Senior Member Joined Nov 13, 2004 Messages 1,417 Feb 7, 2012 #2 Recently tried to solve this problem below: A person throws a ball into the air. The height (in feet) f(t) of the ball after t seconds is given by f(t)=-16t2+64t+4. a. When is the ball at a height of 4 feet? Explain why there are two such times. Click to expand... What did you try? Where is your work? You have the function, which describes the height of the ball. Just plug in 4 for f(t) and solve the quadratic.
Recently tried to solve this problem below: A person throws a ball into the air. The height (in feet) f(t) of the ball after t seconds is given by f(t)=-16t2+64t+4. a. When is the ball at a height of 4 feet? Explain why there are two such times. Click to expand... What did you try? Where is your work? You have the function, which describes the height of the ball. Just plug in 4 for f(t) and solve the quadratic.
