Using the triple beam balance scale to find the mass of an object the first beam is 100, the second is 40 and the third is 7.2. What is the objects mass?

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

the pic attached shows the stages of mitosis. hope it !