How do you solve for the x?

Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. which of the following is not a constant or control for this experiment? a. the type of plant b. the amount of soil c. the amount of water d. the amount of time in the sun select the best answer from the choices provided a b c d

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]