SAT Question 93f48423: Area and Volume answer and explanation with Desmos solution

Choice C is correct. The area, $A$, of a rectangle is given by the formula $A=lw$, where $l$ represents the length of the rectangle and $w$ represents its width. It's given that the rectangle has a length of $7$ inches and a width of $6$ inches. Substituting $7$ for $l$ and $6$ for $w$ in the formula $A=lw$ yields $A=\left(7\right)\left(6\right)$, or $A=42$. Thus, the area, in square inches, of the rectangle is $42$.