Answer:
s=-106
Step-by-step explanation:
Given:
Height of man = 6 ft
Height of man's shadow = 11 feet
Height of building's shadow = 139 feet
To find:
The height of the building.
Solution:
We know that the heights of the objects and there shadows are always proportional.
Let x be the height of the building.
Multiply both sides by 139.
Therefore, the building is 75.8 feet long.
The permutation equation is true for all integers n ≥ 3
<h3>How to prove the equation?</h3>
We have:
Apply the following permutation formula
So, we have:
Evaluate the difference
Expand
Multiply through by (n - 3)!
Expand
Divide through by n!
Take the LCM
Evaluate the like terms
Both sides of the equations are the same.
Hence, the permutation equation is true for all integers n ≥ 3
Read more about permutation at:
brainly.com/question/11732255
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Answer:
16
Step-by-step explanation:
Students 8 x
Time taken (hours) 18 18 - 12 = 6
If number of students increases, the work will completed in less hours.
So inverse proportion
Additional students required = 24 - 8 = 16