I just need domain and range thanks!
also if my work so far is wrong pls let me know

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.