Answer: 20
Step-by-step explanation:
Formula to find the minimum sample size(n) when prior population standard deviation is known.
, where E = Margin of error , = Critical z-value for c confidence interval.
Given : E = 225 g , g
Critical z value for 90% confidence = 1.645
Now,
Hence, the required minimum sample size = 20
Answer:
<em>x = 30°, and y = 46°</em>
Step-by-step explanation:
If we take a look at the attachment below, we will find x = 30°, and y = 46°;
Answer:
<h3>option 5 is the rational number mark as brainliast</h3>
Step-by-step explanation:
<h2>indian genius sarthak</h2>
Answer:
1) angle 1 is 55 degrees
2) angle 2 is 55 degrees
3) angle 3 is 70 degrees
4) angles 1 and 2 are vertical
Step-by-step explanation:
1) angle 1 = 180 - (85 + 40)
2) angle 2 has the same measure of angle 1
3) angle 3 is 180 - (55 + 55)
4) angles 1 and 2 are vertical and congruent