Part A
We have

. To solve for the x-intercept, we set f(x) equal to 0. That is

Take the square root of both sides,
The x-intercept is (-2,0).
To solve for the y-intercept, we set x=0. That is
The y-intercept is (0, 8)
The coordinates of the optimum point are actually the vertex which can be easily seen from the vertex form equation given above. The minimum point is
(-3, -1).
Part B.
We have

.
Factor out -2

Complete the square

Simplify

Part C
We have

.
The maximum height is 12.25 feet after 0.875 seconds from the time of the jump. The dolphin will be back in the water after 1.75 seconds. The graph of the jump is shown in the photo.
A quadrilateral can not have obtuse angles.
Answer:
Option D.
Jenn's answer is not correct. She got it substituting
into the equation and solving for "x".
Step-by-step explanation:
Given the following equation:

Since you need that
, you hace to substitute that value into the equation:

Now you need to solve for "c":

Therefore for a a value of
, you get 
Then, the you can identify that the correct answer is the one given in the Option D.
Jenn made a mistake, because she substituted
into the equation and then solve for "x":
I never took geometry but good luck and gh= 3
Answer:
50
Step-by-step explanation:
im not that sure sorry