Answer: 0.701
Step-by-step explanation:
Formula : 
, where 
significance level , 
Population standard deviation, n= sample size.
As per given, n= 22
Critical z- value for 90% confidence level : 
Then,
Hence , error bound (EBM) of the confidence interval with a 90% confidence level= ± 0.701
Answer:
If Regina wants a mean of 90, she needs to sell 94 books on the 5th day.
Answer:
The decrease was $1755.
At the end of the year, he had $6045 in his account.
Step-by-step explanation:
Start with $7800.
Decrease of 22.5% of $7800.
22.5% of $7800 =
= $1755
The decrease was $1755.
$7800 - $1755 = $6045
At the end of the year, he had $6045 in his account.
Let x℅
so , 20×X/100=12
......x=1200/20 = 60 ℅ ...answer !
For this case we have that by definition of properties logarithm is met:
So, rewriting the expression we have:
By definition of logarithm we have to:
is equivalent to
So:
ANswer:
