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## Homework Statement

find the anverage heigh of z=sqrt(a^2-x^2-y^2) constricted by the cone x^2+y^2<=a^2

in the xy plane

## Homework Equations

Average Height =(1/area)*double integral of region of [z]drdpheta

## The Attempt at a Solution

I really have no idea how to solve this problem can you please point me in the right direction