SOLUTION: The height of a new building in China will be 859 feet. Neglecting air resistance, the height of an object dropped from this building at time t seconds would be given by the polyno

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The height of a new building in China will be 859 feet. Neglecting air resistance, the height of an object dropped from this building at time t seconds would be given by the polyno      Log On


   

Question 628834: The height of a new building in China will be 859 feet. Neglecting air resistance, the height of an object dropped from this building at time t seconds would be given by the polynomial -16t^2+859. Find the height of the object at time t=4 seconds.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Just plug in 4 for t
-16t^2+859
-16*4^2+859
859-256
603
BTw to find out how long it would take to reach the ground set it to zero
-16t^2+859=0 and solve for t
859=16t^2
859/16=t^2
sqrt(859)/4=t
7.32 =t
It will take about 7.32 seconds to hit the ground.