Can someone please answer this question? Btw the picture is upside down(I dont know why it is)

For which pair of functions is (gof)(a)=|a|-2?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?