I'm confused

Find the volume in the figures below. 1) 5) 3 inch cube 15 ft. 4 ft. 6) Rectangular solid 5" x 7" x 8!" 2) 3 in 15 in. 7) Two 8 inch cubes a in 3) 8) A rectangular solid 9 x 10 x 3 inches plus 3 m another whose sides are half as long. 7 m 9) Three cubes 5 yds on a side. - m 4) 19 = cm 10) 12 ft. 10 ft 19 =cm 14 ft. 7 ft. 19 - cm aft