Megan has been planting young trees in her garden. One maple tree is 66 centimeters tall and is growing 8 centimeters per month.
1 answer:
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Answer:
The area of cone is 7240cm³.
Step-by-step explanation:
Given that the diameter is 2 times greater than radius.
So the radius of this cone will be 16cm.
Next, we have to apply volume formula, V = (1/3)×(area of circle)×height.
Formula for area of circle is A = π×r² :
Answer:
It is not reasonable that the state education department claims the percentage for the entire state is 73%.
Step-by-step explanation:
We are given that 191 of the 288 high school students surveyed at a local school said they went outside more during school hours as elementary school students than they do now as high school students.
Firstly, the pivotal quantity for finding the confidence interval for the population proportion is given by;
P.Q. = ~ N(0,1)
where, = sample proportion of high school students who went outside more during school hours as elementary school students than they do now as high school students =
= 0.66
n = sample of high school students = 288
p = population percentage for the entire state
<em> Here for constructing a 90% confidence interval we have used a One-sample z-test for proportions. </em>
<em> </em>
The margin of error is given by;
M.E. =
=
M.E. = 0.056 or 5.6%
So, the confidence interval so formed =
= []
= [0.604, 0.716]
Since the above interval does not include 0.73 or the population proportion of 73% falls outside the above interval. So, it is not reasonable that the state education department claims the percentage for the entire state is 73%.