15
15


⋯
⋯
+ =
∑
∑
3
+
2
n
3
+
2
n

n
=
1
n
=
1

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

a≈380.13mi² would be your answer if the radius was 11 miles

if your equation is in the form ax2 + bx + c, you can find the maximum by using the equation:

max = c - (b2 / 4a).

the first step is to determine whether your equation gives a maximum or minimum.

-x2 + 4x - 2.     thats an example hope it