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If 10% of a radioactive material decays...

If `10%` of a radioactive material decays in `5` days, then the amount of original material left after `20` days is approximately.

A

`60%`

B

`65 %`

C

`70%`

D

`75%`

Text Solution

Verified by Experts

Apply the equation `N=N_(0)e^(-lambda t)`
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