Triangular prism (right-angled triangle)
10 cm
6 cm
9 cm
8 cm

Can someone me with my hwplz(only the circled ones)

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?