8. The Innocence Project found that most faulty convictions were based on a) out-of-date investigating equipment
b) poor DNA sampling
c) inaccurate eyewitness accounts
d) officers not thoroughly observing a crime scene

there are no correct statementd on the list of choices you provided.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

3. dark matter

empty space could also be a simple vacuum