Question

The half-life of silicon-32 is 710 years. If 50 grams is present now, how much will be present in 700 years?(Round your answer to three decimal places.)A) OB) 25.245C) 0.054D) 46.697

Answer 1

In this type of question, we will use the exponential equation

`y=a(b)^x`

Where:

a is the initial amount

b is the factor of growth or decay

Since it is a half-life, then

b = 1/2 = 0.5

Since it is now 50 grams, then

a = 50

Since x is the number of years, then

x = 700

Substitute them in the rule above

`\begin{gathered} y=50(0.5)^(700) \\ y=0 \end{gathered}`

It will be representing 0 grams after 700 years

The answer is A