Answer:
About 3 years Speedy Jet printers be guaranteed.
Step-by-step explanation:
Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with
mean
and standard deviation 
If the company wishes to replace no more than 10% of the printers.
To find : How long should Speedy Jet printers be guaranteed ?
Solution :
Using Z- table,
Z value corresponding to 10% or 0.10 = -1.28.
Applying z-score formula,

The value of x is given by,

Substitute the values,



So, approx 3 years.
Therefore, About 3 years Speedy Jet printers be guaranteed.
Answer:
42
Step-by-step explanation:
The answer to life the universe and everything is 42
Answer:
60%
Step-by-step explanation:
3/5 is 60%
Answer:
The answer is the second option
Step-by-step explanation:
Let u=x^2.





Set this equal to x^2


or



or
