Jamerra received a 3,000 car loan. she plans on paying off the loan in 2 years. at the end of 2 years, jamerra will have paid $450 in interest. what is the simple interest rate on the car loan?

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.