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amid [387]
3 years ago
15

Solve 7x-9=28+4(x-1)

Mathematics
1 answer:
ANEK [815]3 years ago
8 0
I got 10.333333333333
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The percentage of the radioactive isotope left is 25.0000%.

<h3>What is the half life?</h3>

The half life of a radioactive isotope is the time that will elapse before only half of the number of original isotopes will remain.

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Half life (t1/2) = 55 days

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