Cydney.bulit a display stand out of two cubes. The large Cube is 8 inches on each side. The smaller cube is 4 inches on each sid
1 answer:
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Answer:
P(X<118.81)=0.0803
Step-by-step explanation:
Assuming the distribution for the mean life is approximately normal, with mean 120 months and variance 64 months^2, we can calculate the parameters for a sampling distribution with sample size = 89 computers.
The sampling distribution mean will be equal to the mean for a single computer:
The standard deviation will be adjusted by the sample size as:
With these parameters, we can calculate the z-score for X=118.81.
Then, the probability that the mean of a sample of 89 computers is less than 118.81 months is:
Answer:
The slope of the line that passes through the points (1,7) and (-4,-8) is 3.
Step-by-step explanation:
The equation of a line has the following format.
In which a is the slope.
Passes through the point (1,7)
When
So
Passes through the point (-4, -8)
When
So
We have to solve the following system
We want to find a.
From the first equation
Replacing in the second equation
The slope of the line that passes through the points (1,7) and (-4,-8) is 3.