Simplify and write the answer in Standard form as a+bi

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Can someone me out here number 4 plz

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?