Help pls

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid