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
There are 4 cards with a picture of a rose and 3 cards with a picture of a daisy.
After one rose card is removed, the remaining cards are 3 cards with a picture of a rose and 3 cards with a picture of a daisy. A card is chosen at random,
the probability that the chosen card has rose on it is
.
The correct choice is (A).
Answer:
Step-by-step explanation:
<u><em>(1).</em></u> (x - <em>h</em>)² + (y - <em>k</em>)² = <em>r</em>²
where <em>(h, k)</em> are coordinates of a center of the circle with radius <em>r</em>
<u><em>(2).</em></u> ( a ± b )² = a² ± 2ab + b²
~~~~~~~~~~~~~~
( 1 , - 2 ) ; r = 3
( x - 1 )² + ( y + 2 )² = 3²
x² - 2x + 1 + y² + 4y + 4 = 9
x² + y² - 2x + 4y - 4 = 0
a = - 2
b = 4
c = - 4
Answer:
x=72
Step-by-step explanation:
x=3/4x+18
4(x=3/4+18)
4x=3x+72
x=72
What are the choices? You should have inserted a picture.