Samantha drove 440 km in 5 hours. she drove part of the way at 80 km/h and the rest at 100 km/h. what distance did she drive at each speed?

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.