Someone help me answer this please!! I've only got 2-3 hours left to finish my assignment :,[

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number