Math
posted by Alyson .
11. A rocket is fired upward from some initial height above the ground. Its height h in feet above the ground t seconds after it is fired is given by h = 16t2 + 48t +448.
(i) What is its initial height? __________ ft.
(ii) What is its maximum height? ___________ ft.
(iii) How long does it take to reach the ground? __________ sec.
Respond to this Question
Similar Questions

math
A model rocket is launched with an initial velocity of 250 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 250t. How many seconds after launch will the rocket be 730 ft above the … 
math
A model rocket is launched with an initial velocity of 250 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 250t. How many seconds after launch will the rocket be 730 ft above the … 
algebra
The question I have is to solve the problem. A model rocket is launched from the ground with an initial speed of 50 feet per second. The equation that models its height, h feet, off the ground t seconds after it was fired is h=16ft^2+50t … 
math
A model rocket is launched with an initial velocity of 160 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 160t. How many seconds after launch will the rocket be 350 ft above the … 
college algebra
a rocket is fired upward from some initial distance above the ground. Its height in feet, h,above the ground, t seconds after it is fired, is given by h=16t^2+32t+560. 
Math
A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The height of the airplane above ground after t seconds is given by the equation h=16t^+56t+1, where h is the … 
algebra
A model rocket is launched upward with an initial velocity of 200 feet per second. The height, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 200t. How many seconds after the launch will the rocket … 
math
a model rocket is projected straight upward from the ground level. It is fired with an initial velocity of 192 ft/s. How high is the rocket after 10 seconds? 
algebra Please help
.A toy rocket is shot vertically into the air from a launching pad 5 feel above the ground with an initial velocity of 72 feet per second. The height h, in feet, of the rocket above the ground as t seconds after launch is given by … 
college algebra
A rocket is fired upward from some initial distance above the ground. Its height in feet, h,above the ground, t seconds after it is fired, is given by h=−16t^2+64t3072