What Is the Concentration of RNA Whereby a 1:10 Dilution $\mu$

What is the concentration of RNA whereby a 1:10 dilution has an absorbance reading of 0.675 at 260 nm?

A) 33.75 $\mu$ g/mL
B) 337.5 $\mu$ g/mL
C) 27 $\mu$ g/mL
D) 270 $\mu$ g/mL