A negative power means the reciprocal of the number to the equivalent positive power.
So 11⁻³ = 1/11³ = 1/1331 = 0.0007513 (4sf)
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-1331.
0.75 to the negative third power is -0.421875
3 to the negative third power = 0.037 (repeating).
Negative 4 to the third power equals -64
'''(one third) to the power (negative one) = three'''