1. **Problem statement:** Given a right triangular prism with a cross-sectional area of 8.5 cm² and one side length of 30 cm, find the volume of the prism. 2. **Formula used:** The volume $V$ of a prism is given by the product of the cross-sectional area $A$ and the length (height) $h$ of the prism: $$V = A \times h$$ 3. **Given values:** - Cross-sectional area $A = 8.5$ cm² - Length $h = 30$ cm 4. **Calculation:** $$V = 8.5 \times 30 = 255$$ 5. **Answer:** The volume of the prism is $255$ cubic centimeters.