The amount of energy it takes to lift a box might be a function of which of the following?

a. the time of day that you are lifting it
b. the weight of the objects inside the box
c. the shape of the box

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.