eve found a furniture store that sells an entertainment center she wants for $2,445. if the store offers a one-year loan, with a 10% down payment and monthly payments of $195, how much would she pay in interest

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.