Aveterinarian needs to know and animals weight in kilograms is 20 pounds is about 9 kilograms in a dog weighs 30 pounds use a ratio table to find the dogs weight in kilograms explain your reasoning

Is this a polynomial function? i need to know asap

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?

3.4a=57.8 what is the the value of a