Answer for c, d, e, & f?

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?

Solve for x and select the correct answer

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)