Answer:
a) X has a mean of 25 and a variance of 8.
b) The probability that the total weight X is between 22 and 28 oz is 0.711.
Step-by-step explanation:
We have to calculate the mean and variance of a sum of random normal variables.
We can apply the rule for mean and variance for sum of independent variables:
Then, the mean and variance of X is:
We can calculate the probability that X is between 22 and 28 as:
You would need to complete 10/68 of an assignment per day if I'm reading you right to finish on time
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Answer:
Equation is x^2/576+y^2/400=1
Vertical height is 19.84inches
Step-by-step explanation:
The equation of an ellipse with horizontal major axis with center at (0,0) is x^2/a^2+y^2/b^2=1
From the question, a=24 and b=20
Therefore the equation of the ellipse = x^2/24^2+y^2/20^2=1
= x^2/576+y^2/400=1
To calculate vertical height y:
y^2/400=1- x^2/576
y^2=(1- x^2/576)*400
y=20√(1- x^2/576)
At x=3 inches from the centre
y=20√1-0.0156
y=20*0.9922
y=19.84inches
Answer:
The answer is 87.86.
Step-by-step explanation:
First, do 74.45 x .18. Which equals 13.14. You add the 13.14 to the total of the steak. That is 87.86!
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