It is positive 1/144.
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Whenever you see a negative exponent (the negative 2nd power), take the reciprocal of the answer (put one over it):x-y = 1/xySo:9-2 = 1/92 = 1/81 = 0.01234567901
-3-3 = -1/27 or negative one twenty-seventh.
-1 negative (1/3) to the power of 4 is positive 1/81 = 0.0123
One half to the negative first power is equal to the reciprocal of one half raised to the first power. The reciprocal of one half is two, so (1/2)^(-1) = 1 / (1/2) = 1 * 2 = 2.
625/10000 :]