HELP ROUND 479065.389037 TO THE NEAREST THOUSAND
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Here you go, i added a bit of explanation as to why i used the numbers to help you understand the method :)
Initial amount, .
Final amount, .
Time taken, t = 6:00 - 2:00 = 4 hour.
We know,
Therefore, the half-life of the isotope is 1.024 hours.
Hence, this is the required solution.