|x+5|+2>8 absolute value inequalities
1 answer:
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Answer:
The surface area of the cube is
Step-by-step explanation:
we know that
The length of a diagonal of a cube is equal to
where
b is the length side of a cube
In this problem we have
so
solve for b
Simplify
<em>Find the surface area of the cube</em>
The surface area of the cube is equal to
substitute the value of b
Answer:
Atleast 315
Step-by-step explanation:
Given that a journalist wants to determine the average annual salary of CEOs in the S&P 1,500. To save time a sample is taken.
s = sample std dev = 449300
Sample size = n
Margin of error = 50000
Z critical = 1.96
Hence 1.96*std error = 50000
std error = 25510.20
Std deviation/sqrt n = 25510.20
Simplify to get
So sample size should be atleast 315