256-5 = 1/2565 = 9.094947 x 10-13 approximately,
256
256 to the negative one-half power = 0.0625
It's actually -256 not 256
negative 0.0016
-16 × -16 = +256
It is equivalent to 1 over 5 to the power of 5, or 1 over 3125.
If you have a negative number to an even power, you can ignore the neagtive sign. So you are left with 28 which is 256
Negative 5 to the second power would be -5 times -5 which would be 25.
It is -1/5
Five to the negative third power = 0.008
Seven to the negative 5th power is 0.00005949901
2^5 x 2^3 = 2^8 = 256