I need this really quick

Your room is still fairly dark when you wake up early one morning. you look over at your shirt hanging on a hook. you know it's your red shirt because you hung it up there before you went to bed, but in the dark you can't see its color. it looks dark gray to you. why is that?

Solve this system of equations using the elimination method?

What is the power of 10 when 0.00503 is written is scientifically notation