What is 80.2 in standard form??

What is the range? can’t seem to find it out

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =