Answer:
$2,600
Explanation:
To find the cost of the concrete foundation of a building in the shape of a rectangular prism, multiply its volume (in cubic yards) by the cost per cubic yard.
The volume of a rectangular prism is the product of its width, length and height.

Given values:
- w = 13 yards
- l = 20 yards
- h = 2 yards
Therefore, the volume of the concrete foundation is:

Given the concrete costs $5 per cubic yard, multiply the volume by the cost to calculate the total cost of the concrete for the foundation is:

Therefore, the total cost of the concrete for the foundation is $2,600.