C. The quilt will be made of 30 pinwheel designs. The

material to make the large triangles costs $0.08 per

square inch. How much will it cost to purchase the material to make the triangles for the quilt?

The total cost will be 172.8.

Step-by-step explanation:

To find the price we have to find the area of the triangles which is

4 (1/2*b*h)

4 (1/2*6*6)

Hence 72 is the area of triangle.

Now find the cost

Multiply all the values to find the cost:

30*0.08*72

$172.8.