## Related questions with answers

Question

The weight of DDT in a pile of contaminated soil is given by $W_{t}=1800 \times(0.95)^{t}$ grams, where t is the number of years since the soil was contaminated. Find the initial quantity of DDT which contaminated the soil.

Solution

VerifiedAnswered 2 years ago

Answered 2 years ago

Step 1

1 of 2The weight is given as expression:

$\begin{align*} W_t&=1800\cdot 0.95^t\\ t&\to \text{years} \end{align*}$

We have to find the initial quantity of DDT:
Thus,
**a)**

$\begin{align*} t&=0\\\\ W(0)&=1800\cdot0.95^0\\ W(0)&=1800 \end{align*}$

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