Volumetric expansion coefficients of simple materials are often well cataloged. however, the thermal expansion coefficient β of a human body is less well known. this could affect the human body's specific gravity and, therefore, measurements of its body‑fat ratio. suppose that a human body of weight w0 on dry land is placed on a scale while completely immersed in formaldehyde of temperature t1. once the temperature increases by, δt, the scale reading drops by δw. derive an expression for β in terms of δt, w0, and δw by assuming that the ratio of the density of formaldehyde rhof and the initial density of the body rhob is r=rhof/rhob. assume also that rhof does not change when heated.

Please dont copy and paste these things, took me a long time to decode.

1)A and C are correct.

2)No, the deffinitions  have opposite results.

Step-by-step explanation:

1) They want to narrow down to "per writer" and A and C were the only ones that ended with per writer. It's about the writers not the words.

2)Website A had 22 posts per writer and 2200 words per writer.

   Website B had 18.1818... posts per writer and 3090.9090... words per writer.

Their results can't be compared because A is bigger in one thing and B is bigger in another. ( A in posts per writer and B had more words per writer. ) , so they are opposite results.

Hope this helped! Remember to not just copy and paste and expect an answer! If this helped, just give me a rating, a thank you, and maybe a comment if help is needed on another question! Have a great day!