The majority of a forensic scientist's time is spent

Investigating physical evidence.

Explanation:

Forensic scientists pay a lot of time to analyze the evidences. The analysis process is time consuming, requires labor, skill, expertise and technology. The analysis process may take few hours to many days depending upon the obtained evidences. They analyze the results and frame them in expert testimony in such a way so that these can be used for the purpose of conviction of the culprit.  

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.