The correct answer is B) y=80000(1.03)ˣ.
Population growth is represented using an exponential equation. These equations are of the form
y = a(1+r)ˣ, where y is the total population, a is the initial population, r is the growth rate, and x is the amount of time.
We first find the growth rate. This is the percent of change, which is found by
amount of change/original amount
The amount of change from 2010 to 2011 is 82400-80000=2400. 2400/80000 = 0.03, so r = 0.03.
The growth rate from 2011 to 2012 is (84872-82400)/82400 = 0.03. Checking the others, they are very close to this as well, so we will use this as r.
Our value of a in the equation is the initial population, 80000. This gives us:
y = 80000(1+0.03)ˣ = 80000(1.03)ˣ
First, get one of the variables on its own. I'm going to do the first equation since it looks easier. :)
Subtract 6y from both sides.
Divide both sides by 3 to get the variable alone.
Plug this into the other equation for x.
Distribute.
Add like terms.
The system has infinitely many solutions because both sides equal each other.
Hope this helped!
:)
Answer:
y - 0 = -3/4(x - 8)
y = -3/4x + 6
Step-by-step explanation:
Answer:
4 7/20
Step-by-step explanation:
8 1/4 - 3 9/10
get a common denominator of 20
8 1/4 *5/5 - 3 9/10 *2/2
8 5/20 - 3 18/20
borrow 1 from the 8 in the form of 20/20
7 +20/20 + 5/20 - 3 18/20
7 25/20 - 3 18/20
4 7/20
The perimeter is 988 meters
Further explanation:
The given square has different length and breadth which means that the given square is a rectangle.
The formula for perimeter of a rectangle is:
Given
Length=L=256m
Breadth=W=238m
Putting the values in the formula:
The perimeter is 988 meters.
Keywords: Rectangle, Perimeter
Learn more about perimeter at:
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