Mathematics

Mathematics

Problem

A radioactive substance has an initial mass of 160 g and decays by half every 8 days. Determine the minimum number of days required for the mass to become less than or equal to 20 g. a) 16  days16\;\text{days} b) 24  days24\;\text{days} c) 28  days28\;\text{days} d) 32  days32\;\text{days}

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