you measure the optical density of an undiluted solution. The absorbance is .85. If its diluted by a dilution factor of 1/10, what is the optical

you measure the optical density of an undiluted solution. The absorbance is .85. If its diluted by a dilution factor of 1/10, what is the optical density of the diluted solution? If its diluted even further. You pipette 200 micrometers of the diluted solution you created into an empty test tube and add 800 micrometers of water. What is the dilution factor?