If an object is projected upward with an initial velocity of 124ft per sec, its height h after t seconds is h= -16t^2 +124t. What is its height after 4 seconds?

Question

 If an object is projected upward with an initial velocity of 124ft per sec, its height h after t seconds is h= -16t^2 +124t. What is its height after 4 seconds?

Answer 1

putting t=4 sec in the equation h= -16t^2 +124t 

 

h=-16 * 4^2 +124*4 =240 m