Answer:
about two hours ago, while I
Answer:
y=-0.215x^2+35
Step by Step:
Let,
,
,
, 
We know that, the general equation of the parabola.


Substitute the value of
in equation
and find the value of 







Hence, the equation of the parabola is:

Answer:
the selling price is $28.50
i m confused on part b if you explain it i could help
Step-by-step explanation:
You keep the same sign. So:-
4 + 4 = 8 and
--4 + -4 = -8
1/2 + 3/4 = 2/4 + 3/4 = 5/4 = 1 1/4
Here I change to the common denominator 4 so I could add them.