Mathematics, 16.10.2020 20:01 jphan19

PLZ HELP ME I WILL GIVE BRAINLIST What is the inverse function of $y=\sqrt{x-4}$ if $x\ge4$

$A. y=x^2+16,\:x\ge0\\B. y=x^2-16,\:x\ge0\\C. y=x^2+4,\:x\ge0\\D.y=x^2-4,\:x\ge0$

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PLZ HELP ME I WILL GIVE BRAINLIST What is the inverse function of if

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