A toy rocket is fired into the air from the top of a barn its height H above the ground in yards after T seconds is given by the function h of T is equal to -5 t^2 + 10t + 20 1.what is the maximum height of the rocket
2. how long was the rocket in the air before hitting the ground
3.at what time(s) will the rocket be at a height of 22 yards ​

45

Step-by-step explanation:

x = -30/2(-5)

x = -30/(-10)

x = 3 sec

.

Plug above into equation to find height:

h=-5t^2 + 30t

h=-5*3^2 + 30(3)

h=-5*9 + 30(3)

h=-45 + 90

h=45

Lower limit: 800; upper limit: 1199

Step-by-step explanation:

The class limits of the third class is 800 for the lower limit and 1199 for the upper limit. This is because lower limit is the minimum limit while upper limit is the maximum limit. Therefore the lower limit is 800 and the upper limit is 1199.