Question

The radioactive substance uranium-240 has a half-life of 14 hours. The amount

A(t) of a sample of uranium-240 remaining (in grams) after t hours is given by the following exponential function.
At = 3900(1/2) t/14
Find the initial amount in the sample and the amount remaining after 60 hours.
Round your answers to the nearest gram as necessary.

PLEASE HELP ASAP

Answer 1

See analyris

Explanation:

`Hlug\ in\ the\ value\ of \left.\ t.\right\}`

`The\ infital\ ampunt\ in\ the\ sample:`

`t=0_(-1)\ \ \ \ \ f(t)=39\omega\bullet((1)/(2))^(0)/(14)`

`=3900\ g.`

`Ater\ bo\ busis.`

`t=6,\ \ \ \ \ A(t)=2900*((1)/(2))^(60)/(14)`

`=3900*((1)/(2))^(30)/(7)`

`\approx 209.`

I hope this helps you

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