How mathematics helps organize patterns and regularities in the world?

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

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.

Me i'm timed right now! there's 4 answer