could I know the answers for this also let me know how to solve this!

Answer:
280 ft³
Step-by-step explanation:
Volume of the prism will be ,
=> V= Base area × height .
The base is a triangle , so ,
=> V = 1/2 * 7*8 * h
=> V = 28 * h
Here height is 10ft , so
=> V = 28 * 10
=> V = 280 ft³