Divide 40.83 by 7. round your answer to the nearest tenth

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

What is 20+(5 x 2/5 )+ 3 show your work

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.