SAT Question 02b02213: Area and Volume answer and explanation with Desmos solution

Choice D is correct. The perimeter of a figure is equal to the sum of the measurements of the sides of the figure. It's given that the rectangle has a length of $4$ inches and a width of $9$ inches. Since a rectangle has $4$ sides, of which opposite sides are parallel and equal, it follows that the rectangle has two sides with a length of $4$ inches and two sides with a width of $9$ inches. Therefore, the perimeter of this rectangle is $4+4+9+9$, or $26$ inches.