Quadratics and Projectile Motion

What is the Axis of Symmetry?

• x = -8

• x = -4

• x = 4

• x = -2

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation 
s(t) = –16t² + 64t + 80.
What will be the object's maximum height? 

• 2 ft

• 80 ft

• 144 ft

• 64 ft

What algebraic term are you solving for if the word problem is: Members of the math club launch a model rocket from ground level with an initial velocity of 96 ft/sec. This can be modeled with the function h(t) = -16t² + 96t. When does the rocket land?

• x-intercept

• y -intercept

• vertex

• axis of symmetry

A ball is thrown vertically into the air. Its height in feet after t seconds is given by the equation h(t) = –5t² + 20t, and is graphed below. How high will the ball be after 3 seconds?

• 20 ft

• 15 ft

• 5 ft

• 10 ft

• 95 feet

• 45 feet

• 70 feet

• 171.56 feet

• 10 seconds

• 64 seconds

• 960 seconds

• 2 seconds

• 1024 meters

• 64 meters

• 960 meters

• 2 meters

• 1

• 7

• -4

• 9

Tags

CCSS.8.EE.A.2

The pathway of an arrow can be represented by the equation h = -16t² + 80t + 25, where h is the height in feet and t is the time in seconds. What is the maximum height?

• h = 125 feet

• h = 80 feet

• h = 95 feet

• h = 140 feet

The height of an object thrown into the air can be modeled by the formula h(t) = -16t² + 70t + 95, where h(t) is in feet after t seconds.
What is the height of the object after 5 seconds?

• 95 feet

• 45 feet

• 70 feet

• 171.56 feet