Aprofessor uses a video camera to record the motion of an object falling from a height of 250 meters. the function f(x) = –5x2 + 250 can be used to represent the approximate height of the object off the ground after x seconds. which is the best estimate for the amount of time elapsed when the object is 120 meters off the ground?

4 seconds
5 seconds
6 seconds
7 seconds

The answer is approximately 5.09 seconds.

Step-by-step explanation:

The given equation is:

f(x) = -5x^2 + 250

To find the elapsed time, x, set the equation equal to 120 and solve for x:

-5x^2 + 250 = 120

-5x^2 = -130

x^2 = -130/-5 = 26

x = Sqrt(26) = 5.09 seconds.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: