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Colt1911 [192]
1 year ago
13

Imagine your friend is writing an argument to convince adults that they should allow teens to own and use smartphones. Read her

argument excerpt and answer the question that follows: Parents should allow teens to own smartphones. To not do so is just dumb in this day and age. Edudemic.com reported in 2012 that smartphone ownership was rising. Dr. Meryl Ain notes that nearly 8 out of 10 teens own a cell phone and 37 percent own a smartphone. More than 70 percent of students who own one use apps for learning and studying. Students without such a device and tools are at a disadvantage compared to their peers. Their parents obviously don't truly care about their education. Which of the following is true about this argument excerpt? It is respectful in tone to the audience and supports its claim with specific, credible evidence. It contains specific, credible evidence but uses a disrespectful tone that should be revised. It fails to support its claim with specific, credible evidence and uses a disrespectful tone. It uses a respectful tone but needs specific, credible evidence to support the claim.
Mathematics
1 answer:
Blababa [14]1 year ago
5 0
I think it is the 2nd one

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A regular decagon has sides that are 8 cm long. What is the area of the figure? Round to the nearest whole number.
blsea [12.9K]

<u>Given</u>:

Given that the regular decagon has sides that are 8 cm long.

We need to determine the area of the regular decagon.

<u>Area of the regular decagon:</u>

The area of the regular decagon can be determined using the formula,

A=\frac{s^{2} n}{4 \tan \left(\frac{180}{n}\right)}

where s is the length of the side and n is the number of sides.

Substituting s = 8 and n = 10, we get;

A=\frac{8^{2} \times 10}{4 \tan \left(\frac{180}{10}\right)}

Simplifying, we get;

A=\frac{64 \times 10}{4 (\tan \ 18)}

A=\frac{640}{4 (0.325)}

A=\frac{640}{1.3}

A=642.3

Rounding off to the nearest whole number, we get;

A=642 \ cm^2

Thus, the area of the regular decagon is 642 cm²

Hence, Option B is the correct answer.

5 0
1 year ago
isco Fever is randomly found in one half of one percent of the general population. Testing a swatch of clothing for the presence
maks197457 [2]

Answer:

0.8894 is the probability that the test result comes back negative if the disease is present .

Step-by-step explanation:

We are given the following in the question:

P(Disco Fever) = P( Disease) =

P(D) = \dfrac{1}{2}\times 1\% = 0.5 \times 0.01 = 0.005

Thus, we can write:

P(No  Disease) =

P(ND) =1 - P(D)= 0.995

P(Test Positive given the presence of the disease) = 0.99

P(TP | D ) = 0.99

P( false-positive) = 4%

P( TP | ND) = 0.04

We have to evaluate the probability that the test result comes back negative if the disease is present, that is

P(test result comes back negative if the disease is present)

By Bayes's theorem, we can write:

P(ND|TP) = \dfrac{P(ND)P(TP|ND)}{P(ND)P(TP|ND) + P(D)P(TP|D)}\\\\P(ND|TP) = \dfrac{0.995(0.04)}{0.995(0.04) + 0.005(0.99)} = 0.8894

0.8894 is the probability that the test result comes back negative if the disease is present .

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1 year ago
Find the standard form equation of an ellipse with a focus at the origin and the point 4,2 on the latus rectum
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2 years ago
An appliance manufacturer recommends keeping the freezer set at -18 degrees C. Explain what the absolute value tells us about -1
LenaWriter [7]

Answer: I do not know honestly

7 0
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A civil engineer tested concrete samples to investigate the difference in strength, in newtons per square millimeter (N/mm2), be
xxTIMURxx [149]

Answer: d)In repeated samples of the same size, approximately 95 percent of the intervals constructed from the samples will capture the population difference in means.

Step-by-step explanation:

Confidence interval is constructed to estimate a range of values that could possibly contain the population parameter. This could be the population mean or population proportion. A 95 percent confidence interval does not mean 95% probability. It tells how confident that we are that the confidence interval contains the population proportion. If we construct 100 of the given confidence interval, we are confident that 95% of them would contain the true population parameter. Therefore, the correct option is

d)In repeated samples of the same size, approximately 95 percent of the intervals constructed from the samples will capture the population difference in means.

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2 years ago
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