Using an exponential function, it is found that the value of Yong's investment account after 7 years is given by:
(C) $2363
<h3>What is an exponential function?</h3>It is modeled by:
In which:
Her account was worth $2000 initially, and it increases by 10%, percent every 4 years, hence, it is modeled by:
After 7 years, the amount is:
Hence option C is correct.
More can be learned about exponential functions at brainly.com/question/25537936
We want to see which is the conic equation that has 2 squares with the same sign and different leading coefficients.
We will see that it is the equation of the ellipse.
Now let's see why that is the correct answer.
The general conic equation is of the form:
Where A and B are the leading coefficients, (a, b) is the center of the figure, and R is the average radius of the figure.
For example, if A = B, this would be the equation of a circle, but we must have two different leading coefficients.
If we write:
A = 1/C
B = 1/K
(both are positive, because "it has two squares with the same signs").
Then we get the equation:
We get the equation we wanted.
The same sign in both square parts and different leading coefficients.
The above equation is the general equation of an ellipse.
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