Answer:
And rounded up we have that n=656
Step-by-step explanation:
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by 
and 
. And the critical value would be given by:
Solution to the problem
The margin of error for the proportion interval is given by this formula:
(a)
Since we don't have prior info for the proportion of interest we can use 
as estimator. And on this case we have that 
and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=656
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D) -22 + 24i
,,,,.............</span>
A regular hexagon is a polygon and a unregular is not a polygon
Hello there!
There are 10 marbles and 2 of them are red. First pick is 2/10 to get a red and then if you pick a red marble then you have a 1/9 chance to pick a red.
So, 2/10 x 1/9 = 2/90
Simplify 2/90 to get 1/45.
Convert 1/45 to a decimal.
1/45 : 0.022222
Therefore, the probability to the nearest 10th of a percent that both marbles drawn will be red is 0.02%
Answer:
(= 7.81 )
The distance between (-2,-3) and (3,3) is 7.81
Step-by-step explanation:
The distance between two points can be calculated using :
First point A = (-2,-3)
= -2
= -3
Second Point B = (3,3)
= 3
= 3
Insert the value of X and Y coordinates in the formula:
= 7.86
Distance between A and B is 7.81
