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
Step-by-step explanation:
TO show that this system has no solution, use the y value in the second equation and put it in for y in the first. Then solve.
x + 2y = -4
x + 2(-1/2x - 4) = -4
x - x - 8 = -4
-8 = -4
Because this is an incorrect statement, we can tell there is no solution.
Answer:
-25.5
Step-by-step explanation:
Hi Baby girl,
59.2 - 84.7 can be worked out this way:
First calculate 84.7 - 59.2 on your rough paper
That gives 25.5
Finally make your answer a negative number (since the question is about subtracting a larger number from a smaller number)
The answer therefore is -25.5