What is the frequency of a wave with a speed of 910 cm and a wavelength of 26 cm? The frequency of the wave is? 936 hertz

23660 hertz

35 hertz

0.0286 hertz

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.