A student reads in a newspaper that the soil in his area contains high levels of arsenic. Based on this information, he believes that his fellow high school classmates have this metal present in their bodies. To test his hypothesis, he conducts an investigation of the soil in his school yard to see if it is contaminated with arsenic. He tests seven different areas around the school and finds high levels of arsenic in each. He concludes that the students at the school must have high levels of arsenic in their systems as well. Which of these is the best evaluation of his conclusion?

Answers

Answer 1

The best evaluation of his conclusion is it is flawed because he did not test the students to see if their bodies contained metal arsenic.

What is arsenic?

Arsenic is an element that is usually found mixed with sulfur and other metals.

Its heavy exposure can cause fatalities and its exposure for a long time can damage the liver, skin, kidney, etc.

In the experiment, he doesn't test students for correct results, so the experiment is flawed.

Thus, the correct option is D, His conclusion is flawed because he did not test the students to see if their bodies contained metal arsenic.

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Related Questions

What is the volume of the prism? whole-unit cubes fit inside the prism. quarter-cubic units fit inside the prism. the total volume of the prism is units3.

Answers

Answer:

8

2

8 1/2

Explanation:

i just did it

Answer:

8

2

8 1/2

Explanation:

i just did it

How does the time period of the setting in "part 1: a son's adventures" shape penelope?

Answers

Answer:

It forces her to have to outwit her suitors instead of having the option to merely refuse them.

book : Odyssey

Penelope is Odysseus' wife

Odysseus is far away

Other people men want marry Penelope because they think

Odysseus is dead

Penelope tells her suitors that she will marry one of them when she finishes a weaving, a burial shroud for Laertes, Odysseus's father.

As she weaves the shroud during the day, at night, away from the eyes of the suitors, Penelope undoes the weaving that she had done that day.

studycom

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It describes the physical and social elements common to this work. note that common contexts are listed toward the top, and less common contexts are listed toward the bottom. according to o*net, what are common work contexts for reporters and correspondents? check all that apply.exposed to hazardous conditionstelephonecontact with otherselectronic mailface-to-face discussionsin an open vehicle or equipment

Answers

The physical and social elements that are involved with the reporters and the correspondents telephone, contact with others, electronic mail and the face to face discussion.

What is the role of reporters and correspondents?

The reporters and the correspondents are the individuals that act as in collecting the data and broadcasting them.

The elements that are corresponded to the reporters and correspondents are telephone, direct contact with the individuals, electronic mails, and the face to face discussion.

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Answer:

2 3 4 5

Explanation:

UwU

Consult a current dictionary or other reference book and write a brief definition of technology.

Answers

Answer:

The application of scientific knowledge for practical purposes, especially in industry. Machinery and equipment developed from the application of scientific knowledge.

Explanation:

Good luck on the test bro

Tone should not be confused with _____ which refers to the feeling the reader gets from the writer’s words.

Answers

Answer:

Mood

Explanation:

...................

What is the biggest weakness of da vinci’s argument? he incorrectly concludes that other stars do not have their own light. he relies on his own personal feelings and preferences. he suggests that the sun helps sustain life on earth. he relies too much on others’ points of view.

Answers

Answer:

A- He incorrectly concludes that other stars do not have their own light.

Explanation:

Edge 2022 ;)

Answer:

The answer is indeed A.

Explanation:

The student hypothesizes that a greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater.

Answers

A greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater due to inelastic collision.

What is kinetic energy?

It should be noted that kinetic energy simply means a form of energy of an object due to motion.

In this case, a greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater due to inelastic collision.

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How many electrons in an atom can have each of the following quantum number or sublevel designations?

Answers

Answer:

Only one electron in a given atom can have the set of quantum numbers given in the question.

Express the alternative hypothesis in symbolic form. a professor claims that the mean amount of time​ (in hours) sophomores spent studying for the biostatistics final exam is more than that of freshmen. assume that the two samples are independent. let the freshmen be the first population and the sophomores be the second population.

Answers

The alternative hypothesis expression in its symbolic form is H1: u1 < u2.

What is the symbol for alternate hypothesis?

The alternative hypothesis is often denoted with the code Ha or H1. One can also use the symbols or less than, greater than, etc. ( e.g. ≠, >, or <).

Note that in this case, If the professor reject the null hypothesis, then one can say that there was no enough evidence to support the claim of the alternative hypothesis. But this do not state that a claim is seen as true or false.

See options below

A) H1: μ1 = μ2

B) H1: μ1 # μ2

C) H1: μ1 < μ2

D) H1: μ1 > μ2

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(___________) are financial aid offered to students
who qualify to borrow money to pay for college.The money must be repaid and usually with interest after you graduate from college.
A. Grants
B. Scholarships
C. Loans
D. Banks

Answers

Answer: Loans

Explanation:

Loans is  a thing that is borrowed, especially a sum of money that is expected to be paid back

A pendulum is made by tying a 75 g ball to a 130-cm-long string. the ball is pulled 5.0∘ to the side and released.

Answers

The ball’s speed and direction at the lowest point of trajectory are; 3.1 m/s and swing to the same angle on the other side

What is the speed at the lowest point?

We will assume that all of the motion will transfer to Kinetic Energy at the lowest point. Now, the difference in height will be;

Δh = (130 – 130*cos °5) = 0.49 cm

The change in PE is;

ΔP.E = mgΔh

ΔP.E = 9.8m/s² × 0.75kg × 0.049 m

ΔP.E = 0.36015 J

Formula for kinetic energy is;

K.E = ¹/₂*m*v²

From conservation of energy;

K.E = P.E

Thus;

¹/₂* 0.075 * v² = 0.36015

v = √[(0.36015 * 2)/0.075]

v = 3.1 m/s

Thus, the pendulum will swing to the same angle on the other side.

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A cube has a lateral area of 9 square centimeters. What is the length of each edge of the cube? 1. 5 cm 1. 5 cm2 2. 25 cm 2. 25 cm2

Answers

Answer:

1.5 cm

Explanation:

0    0

\____/

Answer:

1.5 cm

Explanation:

As used in line 7 (“relevant”) , the word “relevant” most nearly means
Choose 1 answer:
connected.
linked.
useful.
pertinent.

Answers

Answer:

d) pertinent

Explanation:

Assuming that this is the same 'line 7' from your other question that read '“Although air is mostly nitrogen, this gaseous form of nitrogen is inaccessible to plants and must be “fixed” from the air into ammonium to render it biologically relevant”) ("Although . . . relevant")' , i believe the answer is d) pertinent [in other words, suitable or fitting]

What number is represented by point p? please type your answer as a decimal number.

Answers

Answer:

3.14

Explanation:

point p or greek symbol pi means 3.14

The director of a play must decide how much to charge per ticket. If tickets cost c dollars each, a total of (755c) people will attend the play. Which ticket price will generate the most income?

Answers

The ticket price must be kept at $7.5 to maximise revenue generated from the selling of tickets.

What is a Function?

A function assigns the value of each element of one set to the other specific element of another set.

The cost of a ticket is represented by c, while the number of people who will attend the party is given by the formula (75-5c). Therefore, the total revenue that will be generated from the sale of the tickets is,

Revenue, (R) = c × (75 - 5c) = 75c - 5c²

Now, to know the maximum of the income, we must differentiate the function and then put it against 0. Therefore, the differentiation of the function will be,

[tex]\dfrac{dR}{dc} = 75-10c[/tex]

Now, if we substitute the value of the differentiated function with 0.

[tex]75-10c=0\\\\-10c =-75\\\\c = 7.5[/tex]

Hence, the ticket price must be kept at $7.5 to maximise revenue generated from the selling of tickets.

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In the song, the heaviest baby weighed 10 pounds at birth. 10 pounds is the

Answers

if the heaviest baby was 10 pounds, 10 pounds could be defined as the maximum

How does the kitchen setting affect both arturo and martin

Answers

Answer:Arturo usually feel comfortable in the restaurant. But today, in the kitchen, he working for martin, who refuse to treat him specially.

Explanation:

Give your own position on human trafficking in south africa brainly

Answers

Human trafficking in South Africa is still a critical problem that must be tackled with laws protecting citizens and actively combating this situation.

How to abolish human trafficking?

It is essential that there are consistent government measures to control and combat this situation, to extinguish this situation that violates the human rights to life, security and liberty.

Therefore, every human being has the right to the protection of their essential rights, and it is up to the government of a country to implement strict rules and laws to combat human trafficking and promote better life opportunities.

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A customer buys a cd for $15 and a video game. The customer pays a total of $42. 80 for the two items, which includes 7% sales tax. Which equation can be used to find x, the cost of the video game before tax? 0. 07 (15 + x) = 42. 80 0. 07 (42. 8 minus 15) = x 1. 07 (15 + x) = 42. 80 1. 07 (42. 8 minus 15) = x

Answers

Answer:

Well my reasonable answer was 6478-7.,4x=564 but correct me if im wrong

Explanation:

When white light is passed through a diffraction grating, the color closest to the center bright spot corresponds to ?

Answers

do you have multiple choices or no?

Four years ago omega technology, inc., acquired a machine to use in its computer chip manufacturing operations at a cost of $35,000,000. the firm expected the machine to have a seven-year useful life and a zero salvage value. the company has been using straight-line depreciation for the asset. due to the rapid rate of technological change in the industry, at the end of year 4, omega estimates that the machine is capable of generating (undiscounted) future cash flows of $11,000,000. based on the quoted market prices of similar assets, omega estimates the machine to have a fair value of $9,500,000.

Answers

The machine's book value at the end of Year 4 given the acquistion cost and the useful life is $15,000,000.

What is the machine's book value?

The book value of an asset is the cost of an asset less the accumulated depreciation.  Straight line deprecation distributes the depreciation expense evenly over the useful of the asset.

Straight line deprecation expense = (cost of the asset - salvage value) / useful life

$35,000,000 / 7 = $5,000,000

Book value = $35,000,000 - ($5,000,000 x 4) = $15,000,000

Here is the rest of the question: What is the machine’s book value at the end of Year 4?

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A job candidate at a large job fair can be classified as unacceptable

Answers

Answer:

True

Explanation:

There are 3 different classifications:

-unacceptable

-provisional

-acceptable

Based on the information in this graphic organizer, what is the research question the researchers wanted to explore? (site 1)

Answers

Graphic organizers are the representation of the content in a diagrammatical manner. The question that the researcher wanted to explore is, whether a person's position and environment affect his personality.

What is a graphic organizer?

A graphic organizer represents the concept diagram, concept map, cognitive organizer, etc. that uses the symbols and diagrams to show the context matter.

The graphic organizer is used to study the change in behavior of the students who were assigned different roles in prison. The researchers wanted to analyze the effect of the job roles and environment on the student.

Therefore, the roles and environment of the job were analyzed.

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What is the main similarity between "on virtue" and frost’s poem "mending wall"? both use everyday language. Both use a similar rhyme scheme. Both use free verse. Both use blank verse

Answers

Answer:

D on edge both use blank verse

Explanation:

The main similarity between "on virtue" and frost’s poem "mending wall" is that both use blank verse.

What is on virtue about?

The poem on virtue" is a poem that talks about a lot of subjects such as Religious and Moral.

Conclusively, Note that the “On Virtue” is said to be a short poem that tells on about evangelical conversion and when view along with frost’s poem "mending wall" is that both use blank verse.

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Payday loans are known for trapping borrowers in ""an endless cycle of debt. "" explain what this means and how it happens

Answers

Payday loans are granted at a high-interest rate and are considered the trapping of the borrower.

What is a payday loan?

A payday loan is given as a loan granted to the borrower at the high-interest rates based on the income of the borrower. These loans are granted for a short period of time.

With the use of these loans by the lender to make high profits over the loan, the payday loans are considered as the trapping cycle that results in endless debt.

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Define the electronegativity. explain the trend of electronegativity in periodic table.

Answers

Answer:

1. Electronegativity is the property of an atom that attracts the shared pair of an electron to itself.

2. Electronegativity increases and decrease. It increases when to you from to the side or across of a period because the number of charge in the nucleus increases. Electronegativity decreases when you move down in a group because the electrons move farther or become far from the nucleus's pull.

Explanation:

I hope it helps! Have a great day!

pan~

Which is the best conclusion someone can draw from this graph? all income groups vote at roughly the same percentage. Citizens with higher incomes are more likely to vote. People with mid-level income vote at the highest rates. Income level is not related with voter turnout

Answers

The best conclusion which can be drawn from the graph is that the citizens with higher incomes are more likely to vote.

What is histogram?

A histogram is the way of representation of data which is used to show the frequency distribution using the rectangle, similar to a bar graph.

The provided graph, shows voter turnout by family income in 2016 election. Here in the graph,

X-axis is labeled with income in a thousand of U.S. dollars.Y-axis is labeled with percentage voted in 2016 election.

Here, the length of the histogram is increasing with the income of the family. This represents that the citizen with higher incomes are more likely to vote.

Thus, the best conclusion which can be drawn from the graph is that the citizens with higher incomes are more likely to vote.

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Answer:

B on Edge

Explanation:

I got it right.

Two sides of the triangle are 13 and 51. what is the range of the length of the 3rd side?

Answers

The range that the third side of the given triangle will fall within is: 38 < 3rd side <64.

How to Find the Range of a Side of a Triangle?

If we are given two sides of a triangle, to find the range of the possible length of the third side, simply add both given sides and subtract both given sides to get the range the length of the third side will fall in.

Given a triangle has lengths, 13 and 51, the possible length of the third side would be:

51 - 13 = 38

51 + 13 = 64

Range would be, 38 < 3rd side <64.

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One message that i learned from the text is that acting with kindness is more important than following the rules

Answers

Answer:Not really

Explanation:

If your being kind to someone thats great but  breaking the rules to be kind to them is not great. Its like saying that i was being kind to some because they asked me to steal something for them.

Britney just got a new video game for her birthday. yesterday, she played for 27 minutes and beat 3 levels. today, her parents said she can play for 45 minutes.

Answers

Answer:

5

Explanation:

27 divided by 3 is 9

9 x 5 is 45

britney can play 5 more levels

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An institutional review board (IRB) helps to ensure the safety of subjects of review. Who typically sits on such a board?A. Academic scholarsB. LiteraturerC. All of aboveD. None of these Which of the following is a geometric series? 0.1 0.3 0.5 0.7 1 3 9 27 19 17 15 13 0.4 0.9 1.5 2.2 In the recipe for early winter spinach salad, if you did not know what a SHALLOT was, which of the following would beyour best option for finding out what it is?a. a dictionaryC.a thesaurusb. an almanacd. none of the abovePlease select the best answer from the choices provided rudy has punch cards for his favorite tea house abs his favorite coffee shop. he currently has 1 punch on the tea punch card and 2 punches on the coffee punch card. given his regular routine he consistently earns 7 new punch cards per week on the tea punch card and 6 on the coffee punch card. before too long rudy will have the same number of punches on each card. how long will it take? how many punches will rudy have on each card? The area of a parallelogram is given by the formula A=bh. The area of the parallelogram is 85 sq. Units. Find its base and height. 1. Find two numbers that...a. multiply to -40 and add to -6.b. multiply to -40 and add to 6.c. multiply to -36 and add to 9.d. multiply to -36 and add to -5.If you get stuck, try listing all the factors of the first number. Select the correct answer. George has been sentenced to a thirty years in prison. Considering this information, which crime might he have committed?A. speedingB. traffic violationC. murderD. trespassingAnswer: Murder This is for the woman with one black wingperched over her eyes: lovely Frida, erectamong parrots, in the stern petticoats of thepeasant,who painted herself a presentwildflowers entwining the plaster corsether spine resides in, that flaming pillarthis priestess in the romance of mirrors.Each night she lay down in pain and roseto the celluloid butterflies of her Beloved Dead,Lenin and Marx and Stalin arrayed at thefootstead.And rose to her easel, the hundred dogs pantinglike children along the graveled walks of thegarden, Diegoslove a skull in the circular windowof the thumbprint searing her immutable brow.Sonnet in Primary Colors,Rita DoveWhat is the most likely reason Rita Dove chose to call this poem a sonnet?The work has no rhyme scheme.The subject is romantic in nature.The poem contains 14 lines.Each stanza has seven lines. Find the measure of If going from brown to blonde can be bad for your hair, does that mean going from blonde to brown is good for your hair? (This isn't for school I'm just being tired) Stockit, Inc. issued 100,000 shares of the 1,000,000 shares it is allowed to issue. Stockit has repurchased 10,000 of its own shares. The number of shares authorized equals ______ shares. I need it now a reflection across the y-axis followed by a reflection across the x-axis maps parallelogram ABCD onto parallelogram A'B'C'D'.Select all of the true statements. meaning of"No, I was not born under a rhyming planet, not I cannot woo in festival terms." HELP PLEASEE ITS EASY!!!!!!!!! A circle is centered at (7,8). The point (11,8) is located on the lip of the circle. Write the equation for this circle. Which of the following atoms has the least metallic character? Why are pricing decisions important to organization? What is the volume of the right rectangular prism? 21 cm3 42 cm3 120 cm3 240 cm3 If someone is explaining the similarities between two things, he or she is Sean asked 10 of his classmates the amount of their weekly allowance. He recorded the information in this table. $15 $15 $22 $14 $12$24 $16 $25 $15 $15 Match the measures with their values. 13 12 22 15 7 third quartile interquartile range first quartile range