homework help - Technology required. Two rocks are launched straight up in the air. The height of Rock A is given by the function f where f(t) = 4+30t - 16t^2. The height of Rock B is given by g where g(t) =5 + 20 t - 16t^2 . In both functions, t is time measured in seconds and height is measured in feet. Use graphing technology to graph both equations. Determine which rock hits the ground first and explain how you know.

Technology required. Two rocks are launched straight up in the air. The height of Rock A is given by the function f where f(t) = 4+30t - 16t^2. The height of Rock B is given by g where g(t) =5 + 20 t - 16t^2 . In both functions, t is time measured in seconds and height is measured in feet. Use graphing technology to graph both equations. Determine which rock hits the ground first and explain how you know.

1147 viewed last edited 7 days ago

homework help two rocks are launched straight up in air CCSS.HSF-BF.A.1.a.Q.A1.BQF.6 HSF-BF.A.1.a quadratic equations math unit 6 lesson 6

Jadden (Student, 9^th Grade)

Anonymous (last edited 7 days ago)

Rock B hits the ground first.

The graph for Rock B (function g) crosses the x-axis at about 1.5, which means it hits the ground about 1.5 seconds after launch. The graph for Rock A (function f) crosses the x-axis at about 2, which means it hits the ground about 2 seconds after launch.