$\text{a)}{11}^{\sqrt{11}}=2843,863\dots \approx 2843,86$  

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$\text{b)}{12}^{\sqrt{12}}=5475,118\dots \approx 5475,12$  

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$\text{c)}{13}^{\sqrt{13}}=10384,363\dots \approx 10384,36$  

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$\text{d)}{14}^{\sqrt{14}}=19427,567\dots \approx 19427,57$  

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$\text{e)}{15}^{\sqrt{15}}=35890,694\dots \approx 35890,69$