10 pts. how do you solve: (4.2 x 10⁻¹)(2.5 x 10²)

F(x)= 1/x-4, g(x)=4x+1/x a. use composition to prove whether or not the functions are inverses of each other. b. express the domain of the compositions using interval notation.

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Acircle has a circumference of 28.36 units what is the diameter of the circle