1/1000
0.001
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-7p2 -2p3 + 5 is an expression, not an equation or inequality. An expression cannot be solved
0.75 to the negative third power is -0.421875
A negative power means the reciprocal of the number to the equivalent positive power. So 11⁻³ = 1/11³ = 1/1331 = 0.0007513 (4sf)
3 to the negative third power = 0.037 (repeating).
Negative 4 to the third power equals -64