Mrs. o'brien purchases 112 ounces of laundry detergent for $13.44. mr o'brien purchases a 280 ounce container of laundry detergent for $19.60.

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.