Alarge farm had 75 acres of wheat and 62.5 acres of corn the farm crew can harvest the wheat from 12 acres and the corn from 10 acres per day in how many days will all of the fields be harvested

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.