What is

Please answer

Answers

Answer 1

Answer:

Answer:

$\mathrm{Decimal:\quad }\:38.8$

Step-by-step explanation:

$(\left(3-11\right)^2+\left(5-11\right)^2+\left(13-11\right)^2+\left(14-11\right)^2+\left(20-11\right)^2)/(5)\n\left(3-11\right)^2+\left(5-11\right)^2+\left(13-11\right)^2+\left(14-11\right)^2+\left(20-11\right)^2=194\n\left(3-11\right)^2+\left(5-11\right)^2+\left(13-11\right)^2+\left(14-11\right)^2+\left(20-11\right)^2\n\left(3-11\right)^2=64\n\left(3-11\right)^2\n\mathrm{Subtract\:the\:numbers:}\:3-11=-8\n=\left(-8\right)^2$

$\mathrm{Apply\:exponent\:rule}:\quad\left(a\right)^n=a^n,\:\mathrm{if\:}n\mathrm{\:is\:even}\n\left(-8\right)^2=8^2\n8^2=64\n\left(5-11\right)^2=36\n\left(5-11\right)^2\n\mathrm{Subtract\:the\:numbers:}\:5-11=-6\n=\left(-6\right)^2\n\mathrm{Apply\:exponent\:rule}:\quad \left(-a\right)^n=a^n,\:\mathrm{if\:}n\mathrm{\:is\:even}\n\left(-6\right)^2=6^2\n=6^2\n6^2=36\n\left(13-11\right)^2=4\n\left(13-11\right)^2\n\mathrm{Subtract\:the\:numbers:}\:13-11=2\n=2^2\n2^2=4\n\left(14-11\right)^2=9$

$\mathrm{Subtract\:the\:numbers:}\:14-11=3\n=3^2\n3^2=9\n\left(20-11\right)^2=81\n\left(20-11\right)^2\n\mathrm{Subtract\:the\:numbers:}\:20-11=9\n=9^2\n9^2=8\n=64+36+4+9+81\n\mathrm{Add\:the\:numbers:}\:64+36+4+9+81=194\n=194\n=(194)/(5)\n\mathrm{Decimal:\quad }\:38.8$

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