Answer is B. 2.19/Ib (just divide 4 by 8.76)
The answer is Value equals 1583.36 cubic feet
The angles must be acute and all the measured angles must be different.
<h3>What is a triangle?</h3>
This a shape with 3 sides and angke
If in ΔNOP, OP = 7, PN = 13, and NO = 19, then the measure of the angles must be different as well;
Hence the statement that must be true about the angles is that the angles must be acute and all the measured angles must be different. The given triangle must also be a scalene triangle
Learn more on triangles here: brainly.com/question/2938476
Answer: 68
Step-by-step explanation:
As per given , we have
Population standard deviation : 
Critical value for 90% confidence interval =
Margin of error : E= 0.8 milligrams
The formula to find the sample size is given by :-

i.e. 

Hence, the limnologist must analyze 68 samples.