Quadratic Functions

• a

• b

• c

• d

The number of bags of peanuts sold at the

carnival from 1900 to 2004 can be modeled by

S = 2t² + t - 1, where t is the number of years

since 1900. How many bags of peanuts were sold

in 1965?

• 8,482 bags

• 64 bags

• 4,224 bags

• 8,514 bags

• a

• b

• c

• d

The following equation represents the height, in feet, of an object in the air after x seconds. h(x) = -16x² + 48x + 6.

What is the initial height of the object?

• 16 ft

• 6 ft

• 48 ft

• 8 ft

When Annie hits a softball, the height of the ball above the ground after t seconds is given by h = - 4.9t² +19.6t + 1.4 meters. The height of the ball after 1 second is ______ meters.

The function f(t) = -5t²+20t + 60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground? 

• 2 seconds

• -2 seconds

• -6 seconds

• 6 seconds

There are two times that they rocket will be at sea level.

Enter the first time the rocket is at sea level.

Function h can be used to model the height in feet of a rocket from the ground t seconds after it was launched. What was the range of its trajectory?

• 0 < y < 225

• 0 < x < 7.5

• 0 ≤ y ≤ 225

• 0 ≤ x ≤ 7.5

Tags

CCSS.HSF.IF.B.5

CCSS.8.F.A.1

An object is launched at 19.6 meters per second (m/s) from a platform. The equation for the object's height s at time t seconds after launch is s(t)=-16t²+110t+49, where s is in meters. How high is the object after 1 second?

• 143 meters

• 49 meters

• 238 meters

• 110 meters

The graph shows the height of a baseball from the time it is thrown from the top of a building to the time it hits the ground. How much time elapses while the baseball is 80 meters or more above the ground

• sec

• 9 sec

• 7 sec

• 6 sec