you are a server and have table 10 to takes order from. 5 people ordeing everyone want drinks all the drinks coast 2.50 2 people order meal a 15.25 and the rest of the table orders a an 8.75 meal

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.