ANSWER
The maximum value is 625
EXPLANATION
The height of the stick that the bird dropped is modeled by the function;

This function is already in the vertex form.
Let me rewrite it clearly for you to see.

When we compare this to;

we have h=0 and k=625.
k=625 is the y-value of the vertex.
This is the maximum value on the graph of this function.
Answer:
find derivative of function
sub in x value of point to find gradient of tangent
put gradient into y=(gradient)x+c
Sub in point and solve for c
you have found the equation of the tangent.
Answer:
sorry I don't remember bye I will try to remember
Answer:
I'm not 100% sure but I believe the answer is A
You subtract the numbers 7,801 and 4890
The answer is 2,911