Answer:

Step-by-step explanation:
Solve for the value of
:

-Multiply both sides by 


So, therefore, value of
is
.
Its either 1.14 or 0.87 Hope this helps!
The tank is 3/4 full so 9 gallons have been filled
Answer:

Step-by-step explanation:

The graph shows the profile of your parabolic listening device,
5) since (x-a)^2+(y-b)^2=r^2
plug in (-5,2) as (a,b) and r=3
Making the equation:
(x+5)^2+(y-2)^2=9
6) (x-0)^2+(y-0)^2=r^2
since we have (0,5)
0^2+5^2=r^2
Final equation: x^2+y^2=25