Answer:
1 cubic inches
Explanation:
No of cubes = 8
Edge length of each cube = 1/2 inch
Volume of cube is given
where edge is the edge length
Thus volume of cube with Edge length is calculated as explained below

Question states that there are 8 such cubes joined to make a right rectangular prism. Thus volume of right rectangular prism will be sum of volume of 8 such cubes.
volume of right rectangular prism = 8 times the volume of 1/2 inched cubes
= 8* 1/8 = 1 cubic inches
Thus volume of right rectangular prism is 1 cubic inches.