These graphs show the amount of lead in the air and the amount of violent crime over several decades. What can you conclude based on the data?
- The violent crime rate is higher when the lead level is higher
- violent crime rates and levels appear to be unrelated.

- the rate of violent crime is lower when the lead level is higher

What are the major products produced in the combustion of c10h22 under the following conditions? write balanced chemical equations for each. a. an excess of oxygen b. a slightly limited oxygen supply c. a very limited supply of oxygen d. the compound is burned in air

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?