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(C) To solve the equation $30.01^{2} - 19.98^{2} - ? = 21.81^{2}$,we can approximate the values to the nearest integers:$30.01 \approx 30$$19.98 \appr

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$16$

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(C) To solve the equation $30.01^{2} - 19.98^{2} - ? = 21.81^{2}$,we can approximate the values to the nearest integers:$30.01 \approx 30$$19.98 \approx 20$$21.81 \approx 22$Substituting these values into the equation:$30^{2} - 20^{2} - x = 22^{2}$Calculate the squares:$900 - 400 - x = 484$Simplify the left side:$500 - x = 484$Solve for $x$:$x = 500 - 484$$x = 16$

What should come in place of the question mark $(?)$ in the following equation?
$30.01^{2} - 19.98^{2} - ? = 21.81^{2}$

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What should come in place of the question mark $(?)$ in the following equation?$30.01^{2} - 19.98^{2} - ? = 21.81^{2}$