Calculate the surface area of a 9' by 8' by 11' rectangular prism. Just enter the number, not the unit.

What percent of the circle below is shaded?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.