Answer:
16 hiding places
Step-by-step explanation:
768/48
=16
nuts hided/storing the nuts
By <em>weighted</em> average, we need 75 liters of 24 % iodine solution and 25 liters of 40 % iodine solution to obtain 100 liters of 28 % iodine solution.
<h3>How to determine the volume associated with a given concentration</h3>
Physically speaking, concentration is equal to the amount of solute divided by the volume of solution. We have two solutions with same solute and different concentration and can find the right proportion between the 24 % solution and the 40 % solution by concept of <em>weighted</em> average:
x · 24 + (1 - x) · 40 = 28
40 - 16 · x = 28
16 · x = 40 - 28
16 · x = 12
x = 3/4
By <em>weighted</em> average, we need 75 liters of 24 % iodine solution and 25 liters of 40 % iodine solution to obtain 100 liters of 28 % iodine solution.
To learn more on weighted average: brainly.com/question/18554478
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Answer:
1. 98.7 km
2. 303.5 degree
Step-by-step explanation:
Using the alternate angle, the angle at B will be 50 + 10 = 60 degree.
To calculate the length AC of the returning journey, use cosine formula to calculate it.
To find the bearing of the returning journey, use sine rule to calculate it.
Please find the attached file for the solution
Answer:
Less than
Step-by-step explanation:
Sample variance is computed by dividing the Sum of Squares (SS) by the number of samples (n).
Population variance is computed by dividing the Sum of Squares (SS) by the difference between the number of samples and 1 (n-1).
After computing, it would be found that the sample variance is less than the population variance.
