Darius buys a bottle of a chemical solution that contains 70\%70% alcohol. the bottle contains 500500 milliliters of solution. how many milliliters of alcohol are in the solution?

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.