Given the point:
(x, y) ==> (0, 0)
Number of hours the oil spilled for = 10 hours
Rate of increase = 2 inches per hour.
Let's find the equation that models the range of the spill's effect.
Apply the formula:
[tex](x-h)^2+(y-k)^2=r^2[/tex]Where:
(h, k) is the center ==> (0, 0)
r is the radius
Since the oil spills for 10 hours and increases at the rate of 2 inches per hour, therefore, the radius of the circle will be:
[tex]10\times2=20\text{ inches}[/tex]Therefore, the equation of the circle is:
[tex]\begin{gathered} (x-0)^2+(y-0)^2=20^2 \\ \\ x^2+y^2=20^2 \end{gathered}[/tex]ANSWER:
[tex]x^2+y^2=20^2[/tex]