Answer:
30
Step-by-step explanation:
3 times 5 times 2 =30
Answer:

-- Sample Variance
--- Sample Standard Deviation
Step-by-step explanation:
Given


Solving (a): The sample mean

So:



Solving (b): Sample variance (s^2)
This is calculated as:

Where:

So:



Solving (c): Sample Standard Deviation (s)
This is calculated as:



Inequality:
(3/10) ≥ k - (3/5)
Add 3/5 to both sides:
k ≤ (3/10) + (3/5)
Use LCD:
k ≤ (3/10) + (6/10)
Combine:
k ≤ 9/10
83 FT Because if you divide 786 by 12 (Which is how many inches are in a foot) you will get 65.5 ft.