Describe what happens to a parent function when you change k from 0 to –4.
a.
the graph will stay the same.
b.
the graph will shift up 4 units.
c.
the graph will shift down 4 units.
d.
the graph will shift right 4 units.

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.