Jeff invested $30,000 in a business whereas his partner Kris invested $60,000. How much more (in dollars) needs to be invested in order to generate a total that will yield $9,250 annually with a 5% rate of return?

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.