Which is the area of a circle with a diameter of 7 units? (use 3.14 for pi)
1 answer:
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Answer: 482
Step-by-step explanation:
Formula to find the sample size is given by :-
(1)
, where z* = critical z-value (two tailed).
= Population standard deviation and E = Margin of error.
As per given , we have
Margin of error : E= 3
Confidence level = 90%
Significance level =
Using z-table , the critical value for 90% confidence=
Required minimum sample size = [Substitute the values in formula (1)]
[ Round to the next integer]
Hence, the number of observations required is closest to 482.
Answer:
<em>( - 6 , - 1 ) </em>
Step-by-step explanation:
Let's find the rule of that transformation:
1 + = 4 ⇒
= 3
9 + = 10 ⇒
= 1
Thus, the rule of given transformation is ( x + 3 , y + 1 )
So, the image of the point ( - 9 , - 2 ) is
( - 9 + 3 , - 2 + 1 ) = <em>( - 6 , - 1 )</em>