\begin{tabular}{l} Which equation would help determine the cost of 13 markers? \\ Choose 1 answer. \\ (A) \( \frac{13}{\$ 5.79}=\frac{x}{3} \) \\ (B) \( \frac{x}{13}=\frac{3}{\$ 5.79} \) \\ (C) \( \frac{3}{\$ 5.79}=\frac{13}{x} \) \\ (D) 13 \\ \hline\end{tabular}\( \$ 5.79 \)

To find the cost of 13 markers priced at $5.79, we need a proportional relationship that allows us to express the total cost as a ratio. Therefore, option (C) \( \frac{3}{\$ 5.79}=\frac{13}{x} \) is the best choice, as it relates the known cost of 3 markers to the unknown cost of 13 markers. If we analyze the cost per marker, the price of one marker is found by dividing $5.79 by 3, which gives us the cost of a single marker. This can then be multiplied by 13 to determine the total cost. A common misstep in these types of problems is neglecting to keep consistent units, so always double-check your conversions!