Answer:
2.51 < σ < 3.92
Step-by-step explanation:
We will use Chi-Square distribution to create the interval. We have the following information:
n = 41
Level of Confidence : 95%,
This corresponds to Chi-Square values of:
24.433 for the left tail and 59.342 for the right tail
We need to calculate the sample Variance. This is done on attached photo 1 (the shortcut formula for finding variance was used)
We get s = 9.3866.
See the construction of the confidence interval on the second attached photo
Answer:
Step-by-step explanation:
If this was an entire circle, the area could be found by using
Area = pi * r^2 where r = 9
To take the central angle into account, use this formula
Area = 120/360 * pi * r^2
Area = 1/3 * pi * 9^2
Area = 27 pi
area = 84.78 cm^2 which isn't there.
First off, nicely done on the exponents. You'd be surprised on how bad some look ,:D
a)
b)
I think 73 because:
First I did '1,000 + x = 2,450'
Then I got 'x = 1450'
But then 20 can't go into 1450
So I just add another 10 to 1450 an got 1460
1460/20 = 73!
Hope this helps an is correct!!!
Answer:
its B= 3xy^2 4 sqrt 4x^2 on edge
Step-by-step explanation:
