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3 years ago

A certain forest covers an area of

1 answer:

6 0

Let :
P be the Initial Area, = (3500 km²)
r, the rate of decrease = ( - 8.5%)
n, the number of year = 6 years
A the resulting Area: ?

A = P(1+i)ⁿ
A= 3600(1-0.085)⁶
A = 3600( 0.915)⁶
A = 2112.66 km²

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Keywords:

<em>Equation, variable, value, clear </em>

For this case we have an equation with a variable of the form $y = h (x)$ . Where $h (x) = 3x-19$ . Given the value of $h (x) = 71$ , we want to find the value of the variable "x". So, we have:

$h (x) = 3x-19\\71 = 3x-19$

We must clear "x", for this, we add "19" to both sides of the equation:

$71 + 19 = 3x-19 + 19\\90 = 3x$

We divide between "3" on both sides of the equation:

$\frac {90} {3} = \frac {3x} {3}\\30 = x$

Thus, the value of the variable "x" is 30.

Answer:

$x = 30$

Option A

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