If the value of land in an area is increasing 6 percent a year, how long will it take for property values to double?

Respuesta :

Answer:

It will take 11.9 years for the property value to double.

Step-by-step explanation:

The value of the land is modeled by the following equation:

[tex]P(t) = P(0)(1+r)^{t}[/tex]

In which P(t) is the value after t years, P(0) is the initial value and r is the growth rate, as a decimal.

In this problem, we have that:

[tex]r = 0.06[/tex]

How long will it take for property values to double?

This is t when [tex]P(t) = 2P(0)[/tex]. So

[tex]P(t) = P(0)(1+r)^{t}[/tex]

[tex]2P(0) = P(0)(1+0.06)^{t}[/tex]

[tex](1.06)^{t} = 2[/tex]

We have that:

[tex]\log{a^{t}} = t\log{a}[/tex]

So to find t, we apply log to both sides of the equality.

[tex]\log{(1.06)^{t}} = \log{2}[/tex]

[tex]t\log{1.06} = \log{2}[/tex]

[tex]t = \frac{\log{2}}{\log{1.06}}[/tex]

[tex]t = 11.9[/tex]

It will take 11.9 years for the property value to double.