This question includes a lot of potential equations and possible calculations. Make sure you do only what is necessary.

We first find that 500 is $10 %$ of 5,000 .

The question asks for "at least 500," or at least $10 %$, so $10 %$ is correct also.

Every known percentage is at least $10 %$, so they are all correct.

To check the two unknown percentages, we must figure out the values of $x$ and $y$.

When we add all known values, we get $58 \%$, which means that $\(x+y=42 \)%$.

We also know that $\(x=y\)$, so we can plug in $\(y +y=42\)$ :

$$
\(\begin{aligned}
2 y & =42 \\
y & =21 \\
\text { so, } x & =21 .
\end{aligned}\)
$$


This means both are greater than $10 %$, so both are correct.
Thus all answers are correct.