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Pls help ASAP on the whole question.

Transcribed Image Text:1. A sample of radioactive iodine-131 atoms has a half-life of about 8 days. Suppose that 1 000
000 iodine-131 atoms are initially present.
a) Determine a formula for the number of atoms at time t, where t represents number of days.
b) How long will it take for the sample to reach 180 000 atoms? Round your answer correct to 2
decimal places.
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