Answer:
The 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.2087, 0.2507).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
For this problem, we have that:
Suppose a sample of 1537 tenth graders is drawn. Of the students sampled, 1184 read above the eighth grade level. So 1537 - 1184 = 353 read at or below this level. Then
95% confidence level
So , z is the value of Z that has a pvalue of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.2087, 0.2507).
D)42 because u first have to multipy left to right then divide left to right then do the same thing with add and subtract
Hello there!
As I am sure you probably know, area of a rectangle is the length x width. In this shape, I just divided each section into a rectangle.
Your answer will be 302cm.
Look at the way bottom area. If you just make that a 21cm x 10cm rectangle, then you have an area of 210cm.
Next, move up to the little "neck". It is 8cm tall, but we don't know how wide. You can see that on one side of it, there is 8cm of wall, and on the other, another 8cm. As you see from the bottom-most dimension, you will see that the total width for the shape is 21cm. Using this data, we can figure that the width of the "neck" is 5cm. So, 5cm x 8cm = 40cm.
Now, we have our last rectangle. It is 4cm tall, and by using our data from the last problem, we know that the width will be 13cm across (5cm+8cm). Simply multiply 13cm x 4cm, and then you will find a area of 52cm.
Finally, just add up your measurements. 210cm + 40cm + 52cm = 302cm.
I hope I haven't made you bored out of your mind... I hope you can use this to solve any other problems that come up in the future!
Brady
The diameter is 8cm your welcome
Answer:
x = 54
Step-by-step explanation:
These angles are complementary because they add up to 90:
x - 7 + 43 = 90
x + 36 = 90
x = 90 - 36
x = 54