Explanation:
The question is incomplete.
However a standard method to dertmine how workload effects health is developed and is called Harvard step test.
The Harvard Step Test is a fitness test method devised to measure heart and respiratory fitness. It is done by giving some work load to a person for 5 minutes (normally) and then noting his heart rate afterwards in some intervals.
Formula is;
Fitness Index = (100 x test duration in sec) / (5.5 x pulse count between 1 and 1.5 mins)
Answer:
The BOD5 for this sample is 5 mg/L
Explanation:
The BOD5 takes into consideration the difference between the initial DO and the final DO divided by the fraction of the sample tested in a 300 mL BOD flask. The problem states that the sample was directly placed in a BOD bottle so we assume that the volume used was 300 mL of the water sample. The fraction of water is 1 (300/300).

BOD5 = (10-5)/1
BOD 5 = 5 mg/L
Deltas, because volcanoes are a build up of composites, glaciers are from ice melting and leaving behind composites. Deltas are when composites are washed away until there is a whole or trench.
Your answer is Permafrost
The Black Sea is a main body of water separating Europe and Asia.