Answer:
Required Probability = 0.01659
Step-by-step explanation:
We are given that the laptop replacement times have a mean of 3.3 years and a standard deviation of 0.6 years i.e.; 3.3 years and = 0.6 years
Sample of 41 is taken i.e. n = 41.
The Z score probability is given by;
Z = ~ N(0,1)
Let X bar = mean replacement time
So, probability that randomly selected laptop have a mean replacement time of 3.1 years or less = P(X bar <= 3.1 years)
P(X bar <= 3.1) = P( <= ) = P(Z <= -2.13) = 1 - P(Z < 2.13)
= 1 - 0.98341 = 0.01659
Therefore, probability that 41 randomly selected laptops will have a mean replacement time of 3.1 years or less is 0.01659 .
The sales tax would be .09 cents, since 9÷100 is .09. $45.50+.09 is 45.59. 20% is the same as .2. $45.59+.2 is $45.79. Your answer is $45.79.
I hope this helps
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Answer:
The population is 105127 people.
Step-by-step explanation:
If t is the number of years from the present time, it only makes sence to put a 1 there, as that will give you the answer for the current year.