A local Dunkin’ Donuts shop reported that its sales have increased exactly 15% per year for the last 2 years. This year’s sales were $81,237. What were Dunkin' Donuts' sales 2 years ago?

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.