need formula shaded rectangle with circle in middle. shaded area outside 3ft by 5ft.

To find the shaded area of a rectangle with a circle in the middle, first you need to calculate the area of the rectangle and the circle separately, and then subtract the area of the circle from the area of the rectangle.

Let's assume the rectangle has dimensions of 3 ft by 5 ft. The area of a rectangle is calculated by multiplying its length by its width, so the area of this rectangle is:

Area of rectangle = length × width = 3 ft × 5 ft = 15 square feet.

Now, let's move on to the circle. You mentioned that the circle is in the middle of the rectangle, but you didn't specify its size. In order to proceed, we need to know the radius or diameter of the circle. Please provide that information so I can help you calculate the area of the circle accurately.