What type of material has to be present in a rock to use radioactive
dating?

Carbon content or layer of potassium like sediments is the  type of material has to be present in a rock to use radioactive  dating.

Explanation:

Radioactive dating is known to be the process in which the age of fossil fuels and other materials with the help of carbon content in it.  Mostly potassium, uranium, and carbon are used for this type of process. It is a type of process in which the organic material age is determined which are younger about 50 thousand years.  Now as a recent trend there exist a dating method called potassium-argon dating method in which the age of the rocks is found especially.

1. when the tempature rises,your sweat glands and then springs into action making perspiration. some sweat evaporates with your skin taling heat with it.2.some of the blood pumped by the heart travels by your lungs to get rid of carbon dioxide and pick up oxygen.3.saliva produces by, you drinking water which saliva is 98% of. when mucus builds up in your body it also creates saliva as well as, antibacterial compunds.4.when the core body tempature drops, the shivering reflex is triggered to maintain homeostasis. for example: when you get out the pool you start to shiver because it is cold.

Amight be the answer