For radiometric dating, you need to know which of the following?

Radiometric dating is dating a rock or mineral by measuring the proportions of an original radioactive material and its decay products. We need to know the rate at which radioactive decay occurs and how much radioactive decay has occurred. Hope this answers the question. Have a nice day.

Answer// dinosaurs emerged during mesozoic era;

Answer (d) may increase or decrease porosity through dissolution or deposition;