It is 22 cuz 5 * 2 is 10 and 10 * 2 IS 20 + 2=22
Step-by-step explanation:
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Answer:
(
4
x
−
1
)
(
x
−
3
)
Step-by-step explanation:
Factor by grouping.
75 hope this helps but I’m not sure what you’re asking
Answer: a. n= 1068
b. n= 164
Step-by-step explanation:
The formula to find the sample size :

, where p=prior population proportion , z* = critical z-value and E = Margin of error.
Here , let p=proportion of computers that use a new operating system.
Given : Confidence level = 95%
i.e. z* = 1.96 [by z-table]
Margin of error : E = 3% =0.03
a. If p is unknown , then we assume p=0.5
Then, 
i.e. n= 1068
b. p=0.96
Then, 
i.e. n= 164.