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power 4dPower ToTo 655. Pick 6 of your favourite numbers from 1 to 55, each bet is RM1. Supreme ToTo 658. Pick 6 of your favourite numbers from 1 to 58, each bet is RM2.Power of the lens (P) = 4 D. Refractive Index (r) = 1.5. To Find: The radius of curvature. Calculations: The following equation determines a lens's power: where P is the power of