What are three things that brought about great change to Polynesia during the seventeenth century? introduction of deadly diseas
2 answers:
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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
Answer:
13.72units
Explanation:
Given parameters:
Coordinates of the two points = (-5.2, 7) and (3,- 4)
Unknown:
Distance between the two points = ?
Solution:
To find the distance between two points, we use the mathematical expression below;
D =
From the given coordinates;
x₁ = -5.2 x₂ = 3
y₁ = 7 y₂ = -4
Now; input the parameters and solve;
D = =
= 13.72units
The distance between the two points is 13.72units