PLEASE HELP

CH4 + 2O2

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves

Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin