The surface area of the prism is.

300 yd²

Step-by-step explanation:

In such 2d-situation,

Observing the figure we say there are 3 rectangles and 2 unique triangle.

Area of rectangle = length x breadth

Ar. of 1st tilted(front) rec. = 12 x 5 = 60 yd²

Ar. of 2nd tilted(back) rec. = 12 x 8 = 96 yd²

Ar. of the base rec. = 9 x 12 = 108 yd²

Area of each triangle = ½ x 4 x 9 = 18 yd²

Total surface area = 60 + 96 + 108 + 18 + 18 = 300 yd²

She needs to divide 6 by 4.

Step-by-step explanation: