Ruth's gross biweekly pay is $1805. To maintain her current lifestyle, how much should she save up by the time she retires?
2 answers:
Answer:
The answer is $469,300.
Step-by-step explanation:
Ruth's gross biweekly pay is $1805.
Now we will multiply this by 26 to get the yearly salary. Bi weekly means paid twice a month.
This means her yearly pay will be = dollars
To maintain her current lifestyle, Ruth should save at least 10 times the money.
So, the amount becomes dollars
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Answer:
The mean of the total repair time is 150 minutes.
The variance of the total repair time is 725 minutes^2.
Step-by-step explanation:
To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.
In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:
For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):