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:
Diego
Step-by-step explanation:
Diego is because 1m = 100 and Diego is 165 and that is alote bigger from 1.7.
Answer:
10
Step-by-step explanation:
Answer:
j<-1
Step-by-step explanation:
10j<-10
divide both sides by 10 and get
j<-1