What best describes the surface of a concave mirror? a. it is flat b. it is textured c. it curves outward d. it curves inward

Easiest way to figure out your answer in this case would be looking at the definition of Concave. Concave is having an outline or surface that will curve inward (i.e. a circle). So your answer will be D (it curves inward).

I hope this helps answer your question. have a great day

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.