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Perfectly fine thank you for asking 

Why would I do that

When I need help, I do.

((69/69)/69)*(69+69) = 2

u fagit

This si just the difference in area of two circles......the larger one has a radius of 9.5  [the radius of the tree = 1.5 ft plus the 8 foot radius of the sidewalk ]....and the smaller one has a radius of 1.5 ft  = the radius of the tree...so....the area of the sidewalk =

pi ( 9.5^2  - 1.5^2)  ≈ 276.5 sq ft

Here's a pic of the situation :

AB is the radius of the tree = 1.5  ft .....BC is the with of the sidewalk = 8 ft

Why not.

This is why I posted this.

Comment on this to stop the guests who are cursing!

FINALLY REAL MATH!

-56.9932916748

Thank yuo all but the last person who awnsered I don't think that would work but that would be one way that i have srsly considered

Let (x, y) be some point on the parabola.......since the distance from the point to the focus  = the distance of the point from the directrix, we have that

√[ (x - p)^2 + (y - 0)^2 ]   =  √ [ (x + p)^2 + (y - y)^2 ]    square both sides and simplify.....

x^2 - 2px + p^2 + y^2  =  x^2 + 2px + p^2

y^2  = 4px