Answer:
The volume of a triangular prism with a triangle base of 7ft and height of 4ft, and a prism height of 8.5ft is approximately 119 cubic feet.
To find the volume of a triangular prism, you need to use the following formula: Volume = base area of the triangle * height of the prism. To find the base area of the triangle, you need to use the formula: Base area = (1/2) * base * height. Then, you can calculate the volume using the two formulas. Here is an example of how to calculate the volume of a triangular prism with a base of 7ft, a height of 4ft, and a prism height of 8.5ft:
Step 1: Calculate the base area.
Base area = (1/2) * 7ft * 4ft = 14ft^2
Step 2: Calculate the volume.
Volume = 14ft^2 * 8.5ft = 119ft^3 (rounded to the nearest whole number)