You have $48 saved for summer vacation. You can earn $12 for every car that you wash. If you want to take at least $180 with you on your summer vacation, what is the fewest number of cars c you need to wash?

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.