Problem

$2$ The $half-life$ of a radioactive substance is $1200$ years. If the initial amount of the substance is $300$
grams, give an exponential model for the amount remaining after t years. What amount of
substance remains after $1000$ years
$ANsWER$

10th-13th grade

Algebra

Search count: 113

Solution

Qanda teacher - Raji

Student

Can you explain please. I'm kinda confused.

Qanda teacher - Raji

In the question half life of a radio active substance is given..the model given is exponential model so i used this formula

Student

below the NO what is that? is that +/+1/2? The 2 also why is it there? Where did you get the 1200?

Qanda teacher - Raji

no that was t/t 1/2

Student

thank you

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$3$ 3.The $hait-lt1$ $oi$ a radioactive substance $15$ $15n0$ years. $14$ the initial amount of the substance $i5s00$
grams, give an exponential model for the amount remaining after $1$ years. What amount of substance
remains after $3000$ years?
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10th-13th grade

Other

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