Solve the problem.
-If a rock falls from a height of 30 meters above the ground, the height, in meters, after x seconds can be found using the expression What is the height of the rock after 2 seconds?
A) -66.04 m
B) 100.4 m
C) 10.4 m
D) 20.2 m

Question

Solve the problem.
-If a rock falls from a height of 30 meters above the ground, the height, in meters, after x seconds can be found using the expression  What is the height of the rock after 2 seconds?
A) -66.04 m 
B) 100.4 m 
C) 10.4 m 
D) 20.2 m

Quizplus · Accepted Answer

Plugging in the value of x=2 seconds into the expression:

h(2) = -4.9(2)^2 + 30

h(2) = -19.6 + 30

h(2) = 10.4

Therefore, the height of the rock after 2 seconds is 10.4 meters. The correct answer is option C.

Solve the Problem. -If a Rock Falls from a Height of 30 Meters