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edeliz5033
08.12.2019 •
Mathematics
In 2012 the population of a city was 5.92 million in exponential growth was 2.77% per year find the exponential growth function
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Ответ:
The exponential growth function is![P(x)=5.92(1.0277)^x](/tpl/images/0409/2793/97bad.png)
Step-by-step explanation:
Given:
Initial population of a city is,![P_0=5.92\ million](/tpl/images/0409/2793/3e410.png)
Exponential growth rate is,![r=2.77\%=0.0277](/tpl/images/0409/2793/caf60.png)
Let the population for a given year 'x' be
millions.
Now, the exponential growth of a population is given as:
Plug in 5.92 for
and 0.0277 for
. This gives,
Therefore, the exponential growth function is
.
Ответ:
In order to find the value of f(3), we need to take the f(x) equation and put 3 everywhere we see x. Then we follow the order of operations to solve. So, let's start with the original.
f(x) = 2x^2 + 5sqrt(x - 2)
Now place 3 in for each x.
f(3) = 2(3)^2 + 5sqrt(3 - 2)
Now square the 3.
f(3) = 2(9) + 5 sqrt(3 - 2)
Do the subtraction inside of the parenthesis.
f(3) = 2(9) + 5sqrt(1)
Take the square root
f(3) = 2(9) + 5(1)
Multiply.
f(3) = 18 + 5
And add.
f(3) = 23