Air pollutant that causes blood poisining

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.

it was spontaneous.

"ain't i a woman? " is the name given to a speech, delivered extemporaneously, by sojourner truth, (1797–1883), born into slavery in new york state.sojourner truth' delivered her famous speech "ain't i a woman? " (which did not have a title at that moment) was given without any previous preparation. her dissertation took place at the women's convention in akron, ohio, in 1851.