811/2 = sq rt 81 = 9
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5.
A number raised to the power "a" is multiplied by itself "a" times. For example, 5 raised to the power 3 is 5x5x5=125. 2 raised to the power 5 is 2x2x2x2x2=32.
5 to the power of minus 5 is equal to 1 divided by 5 to the power of 5. This simplifies to 1/ (5 x 5 x 5 x 5 x 5), which equals 1/3125 or 0.00032. This is because any number raised to a negative exponent is equal to 1 divided by that number raised to the positive exponent.
Negative 3 raised to the power of 5 is equal to -243.
Yes.