If david's dad's room is rectangular with one side being 8.5 feet, and If David wants to buy a rug to cover half of his bedroom floor, what should the area of the rug be?

Area of rug for half room = 4.25a feet²

Explanation:

Given:

One side of rectangular room = 8.5 feet

Find:

Area of rug for half room

Computation:

Assume;

Another side of rectangular room = a feet

So,

Area of rectangle = length x width

Area of rectangle room = 8.5 x a

Area of rectangle room = 8.5a feet²

Area of rug for half room = Area of rectangle room / 2

Area of rug for half room = 8.5a / 2

Area of rug for half room = 4.25a feet²