Mrs. Jones is making A punch. She uses 1 1/3 of pineapple juice +3/4 of orange juice +2/3 of grape juice +3/4 of Ginger ale. How many cups does she use does

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.