The skating rink is open 6 days a week for people of all ages to come and enjoy roller blading. The cost of skating correlates to the time in hours spent skating. Here is the graph of the function:

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.