Anthony needs a new suit. he has a 20% off coupon that will be applied before a tax of 7.5% is applied to his total. how much will he end up paying for a $275 suit?

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.