Which function represents exponential decay?
f(x) = 1 (2)
f(x) = (-1)
f(x) = 3(?)*
f(x) = 2(~)*

Which of the following is equal to the rational expression when x is not equal to -2 or -6?

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.

Select quivalent or not equivalent to indicate whether the expression above is equivalent or not equivalent to the values or expressions in the last column.