Find the value of each expression 1. -8(3)
2. 5(-2)
3. 2(-1)(-4)
4. -24 ÷ (-3)
5. -100/10
6. 5(-5)(3)

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.