Answer:
Volume of prism = 39 km cubed
Explanation:
IMPORTANT FORMULA: Volume of any prism = Area of base * Height
In this case, the area of the base means the area of the trapezoid.
Area of trapezoid = base1+base2/2 * height
Area of trapezoid = 8+5/2 * 1.5
Area of trapezoid = 13/2 * 1.5 = 9.75
We already know that the height of the trapezoidal prism is 4 kilometers.
So, we have all of the values that are needed to correctly fill in the formula.
Volume of the prism = 9.75 * 4 = 39