Answer:

Step-by-step explanation:
We know that all the vertices of the isosceles trapezoid lie on the parabola, and the points A and D lie along the x-axis, i.e at 
Therefore points A and D are located where



Now we need to find the coordinates of point C; we already have its y-coordinate (it's
), and looking at the figure attached we see that the x-coordinate of point C is
farthar from the coordinate of point C; thus

Therefore the coordinates of C are 
Now this point C lies on the parabola, and therefore must satisfy the equation 


The equation for area depends on the shape of the object
Answer:
B - either remains the same or increases
Step-by-step explanation:
Your answer would be c)
Point slope form formula is y-y1=m(x-x1), where m is slope and x1 and y1 are coordinates to a point on your graph.
To find your slope, you will need to use the formula y2-y1/x2-x1, also known as change in y over change in x or rise over run. So then you would have [3-(-5)]/[2-(-2)], which gives you slope (m) =2.
Then you can rule out letters A and D because the slope in those answers is incorrect (-2).
Next, you take your coordinate points (x,y) (2,3) and substitute them in your equation.
So, you have y-3=2(x-2)
*notice that the difference between b and c is that the x and y values on the coordinate points are in the wrong places. You need to have y-(your y coordinate) and then x-(your x coordinate) in your point slope equation.
Answer:
P.E = mgh = 120N
Step-by-step explanation:
v² = u² - 2as
At the top, the velocity is = 0
0² = 4² - 2 x 10 x s
4² = 20s
s = 16/20
s = 0.8metres.
It rose only 0.8metres.
Therefore P.E = 15 x 10 x 0.8
:. P.E = 15 * 8
:. P.E = 120N