Answer:
Step-by-step explanation:
<em>See attached.</em>
The intersection of the lines is the solution.
<u>Approximate values of the coordinates is:</u>
- (2, 3.5) or (2, 3) if integer values are required
(12^2 + 5) x 2
There you go. I wasn't sure if I was supposed to write an equation or...
= 298
I believe the answer is A
Answer:
it took the airplane 12 seconds to reach the ground
Step-by-step explanation:
Answer:
<em>The ball will take 8.90 seconds to hit the ground.</em>
Step-by-step explanation:
The height of a ball after t seconds is given by:

Determine how long will the ball take to hit ground level. Since the gound is 40 meters below the throwing point:

Rearranging:

Simplifying by 5:

Solving the quadratic equation with the formula:

With a=1, b=-8, c=-8


There are two solutions:
t=8.90 sec, t=-0.90 sec
Due to the nature of the problem, t cannot be negative, thus:
The ball will take 8.90 seconds to hit the ground.