A certain substance decays at a rate of 65 continuously Crea

A certain substance decays at a rate of 6.5% continuously. Create model for the decay of this substance.

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Solution

Let the inital amounty of substance be No gms.So

after time t the decay can be modelled by exponential decay:

N(t) = Noe^(-rt)

where r is the decay rate: r = 6.5% = 0.065

So, N(t) = Noe^(-0.065t)