The pillars in front of Mr. Jefferson's home are shaped like cylinders. The pillars have a height of 24 ft and a radius of 8 in.
1 answer:
Answer:
- <u>Option A. about 100.5ft²</u>
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Explanation:
Since the <em>bases</em> must not be painted, their areas are <em>not included</em> in the calculation.
The <em>surface</em> to paint, of each pillar, is equal to the lateral area of a<em> cylinder </em>with he dimensions given.
The formula for the laeral area of a cylinder is:
Substitute including the conversion factor to convert inches to feet:
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Answer:
Jay's bread size is 220% of the original size.
Step-by-step explanation:
The question is incomplete.
The complete question is as follows.
Jay is letting her bread rise. After 3 hours,her bread is at 11/5 of its original size. What percent of its original size is jays bread dough?
Solution:
Let the original bread size be = units
After 3 hours the bread rises = of the original size
New size of bread = units
Percent of original size the new bread is
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Answer:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the scores for the univerisity A, and we know that:
Let Y the scores for the univerisity B, and we know that:
We select a sample size of size n=2, and since the distirbution for X is normal then the distribution for the sample mean would be given by:
And for the univeristy B we select a sample of n=3
Since both sample means are normally distributed then the difference is also normal distributed with the following parameters:
And we want this probability:
And we can use the z score given by:
And if we replace we got :
And if we find the probability using the normla standard table or excel we got: