SAT Question 2d16d62c: Ratios Rates Proportional Relationships And Units answer and explanation with Desmos solution

It's given that $1$ fathom is equivalent to $6$ feet. Therefore, $58$ fathoms is equivalent to $\left(58\text{fathoms}\right)\left(\frac{6\text{feet}}{1\text{fathom}}\right)$, or $348$ feet. Thus, when the camera is at a depth of $58$ fathoms, the camera's depth, in feet, is $348$.