The boundary of a lamina consists of the semicircles together with the portions of the x-axis that join them. find the center of mass of the lamina if the density at any point is inversely proportional to its distance from the origin. $ y = \sqrt{{\color{red}4}-x^2}, y = \sqrt{{\color{red}16}-x^2}$

the answer is horst.

explanation:

in physical geography and geology, a horst is a raised fault block bounded by normal faults. a horst is a raised block of the earth's crust that has lifted, or has remained stationary, while the land on either side has subsided. the word horst in dutch and german means heap – cognate with english "hurst".

mistakes are ok

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