What is the sum of squares for the group that didn't get treatment? report your answer to two decimal places (e.g. 39.87)
Answers
Sum of squares for the group that didn't get treatment is 228.333. Reporting the answer to two decimal is 228.33.
What is a decimal?A decimal is a number that consists of a whole and fractional part. Decimal numbers lie between the integers and represent the numerical value for quantities that are whole plus some part of a whole.
We get the decimals when we break a whole into smaller parts. A decimal number then has the two components: a whole number part and fractional part. The decimal place value system for whole part of a decimal number is the same as the whole number value system. However, we get fractional part of the decimal number as we move toward the right after the decimal point.
Decimals are a set of numbers lying between the integers on a number line. They are just the another way to represent fractions in mathematics. With the help of the decimals, we can write more precise values of measurable quantities like length, weight, distance, money, etc.
The numbers to the left of decimal point are the integers or whole numbers and the numbers to the right of the decimal point are decimal fractions. If we go right from the ones place, the next place will be (1/10) times smaller, which will be (1/10)th or tenth place value.
Sum of squares for the non-treated group = 13700 seconds
=\(\frac{13700}{60}\)
= 228.333 minutes
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The complete question is:
"Assume you are interested in evaluating the effectiveness of a training program designed to decrease the time required to complete a skilled motor task. Seventeen subjects are randomly assigned to one condition or another: Ten subjects are randomly assigned to receive the training program. A second group of 7 subjects receives no training. All subjects then perform the motor task. Test whether training had any effect on the time (in seconds) required to complete the task using a two-tailed t-test (α = .05). Descriptive statistics for the time required to complete the task (in seconds) are presented below for each group.
Trained group Non trained group
X \(X^{2}\) X \(X^{2}\)
33 1089 50 2500
41 1681 46 2116
38 1444 47 2116
26 676 48 2209
28 784 37 1369
34 1156 39 1521
32 1024 41 1681
30 900
31 961
37 1369"
Related Questions
1. What is the definition of a chemical property?
Answers
Answer:
that can be established only by changing a substance's chemical
Explanation:
Answer:
A chemical property is a characteristic of a substance abserved in chemical reactions.
Explanation:
Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.
In which of the following statements best describes the sun's
convective zone?
The layer of the sun where nuclear
fusion occurs and gives the sun its
energy
The layer of the sun where hot plasma
rises, then falls as it cools near the
surface.
O The layer of the sun seen during a
solar eclipse.
The layer of the sun that radiates
energy outwards from the sun's core.
Answers
Answer:
The answer is the layer of the sun that radiates energy outwards from the sun core
Explanation:
the reason why that is becuase the convection zone is a layers which is unstable to convection. And energy is primarily or partially transported by convection
Answer:
D
Explanation:
If carbon dioxide goes up to roughly 400 parts per million, that is warm enough to melt chunks of land ice. how could this directly affect human health? food shortages increased droughts increased floods rising sea levels
Answers
More water evaporating into the atmosphere causes the world's temperature to rise as carbon dioxide and other greenhouse gases heat the globe.
What effects will an increase in carbon dioxide have on Earth's temperature?
The earth's climate system, which includes the land, atmosphere, oceans, and ice, is changing significantly as a result of the warming.More frequent and severe weather: Storms, heat waves, floods, and droughts are all getting harsher as a result of rising temperatures.Higher death rates: As temperatures rise, so do cases of illness, trips to the ER, and fatalities.Dirtier air: Increased ground-level ozone smog, which is produced when air pollution from industries, cars, and other sources reacts with sunshine and heat, makes air pollution much worse as temperatures rise.Higher rates of species extinction: As land and the water change swiftly, the animals that live there are destined to vanish if they can't adapt. Some will succeed, while others won't.Sea levels will rise because of this: The polar areas are more susceptible to climate change. The world's ice sheets are melting quickly, and average temperatures in the Arctic are rising twice as quickly as they do elsewhere on the planet.Learn more about the Global warming with the help of the given link:
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Indicate if the following pairs of compounds could be separated via liquid-liquid extraction.First, draw the structures of the compounds, next determine whether they are acids or bases or neutral. Finally, look up their pKa (or pKb) values and indicate which aqueous solution would separate them or if they are inseparable. Assume that you can utilize aqueous HCl, NaOH, or NaHCO3 for your extractions. For each case that will not work, give the reason.You don't have to draw structure, just explain if they are able to be separated or not and with what and why.1. picric acid and phenol2. salicyclic acid and phenol3. triethylamine and diethylamine4. 3-nitrobenzoic acid and 2-nitrobenzoic acid5. benzylamine and aniline
Answers
Picric acid and phenol, Salicylic acid and phenol & Benzylamine and aniline can be separated using liquid-liquid extraction but Triethylamine and diethylamine & 3-nitrobenzoic acid and 2-nitrobenzoic acid cannot be separated using liquid-liquid extraction.
1. Picric acid and phenol can be separated using liquid-liquid extraction. Picric acid is a stronger acid (pKa ~0.4) than phenol (pKa ~10). Adding aqueous NaOH will deprotonate picric acid and make it soluble in the aqueous layer, while phenol remains in the organic layer. Then, the two compounds can be separated.
2. Salicylic acid and phenol can also be separated using liquid-liquid extraction. Salicylic acid (pKa ~3) is more acidic than phenol (pKa ~10). Adding aqueous NaHCO3 will deprotonate salicylic acid, making it soluble in the aqueous layer, while phenol remains in the organic layer. The compounds can then be separated.
3. Triethylamine and diethylamine cannot be easily separated via liquid-liquid extraction, as both are bases (pKb values are similar). Aqueous HCl, NaOH, or NaHCO3 will not be effective in separating these compounds. Alternative separation methods, like distillation, may be needed.
4. 3-nitrobenzoic acid and 2-nitrobenzoic acid cannot be separated using liquid-liquid extraction, as they have similar acidity (pKa values are close) and will react similarly with HCl, NaOH, or NaHCO3. Alternative separation methods, like chromatography, should be considered.
5. Benzylamine and aniline can be separated using liquid-liquid extraction. Benzylamine is a weaker base (pKb ~4.2) than aniline (pKb ~9.4). Adding aqueous HCl will protonate aniline, making it soluble in the aqueous layer, while benzylamine remains in the organic layer. The two compounds can then be separated.
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What happens to the volume of a gas if the number of molecules increases twofold (pressure and temperature remain constant)
Answers
If the number of molecules of a gas increases twofold while the pressure and temperature remain constant, the volume of the gas will also increase twofold.
According to Avogadro's law, at constant temperature and pressure, the volume of a gas is directly proportional to the number of molecules or moles of the gas. This means that if the number of molecules of the gas doubles, the volume will also double.
Avogadro's law can be expressed mathematically as:
V ∝ n
where V is the volume of the gas and n is the number of molecules or moles of the gas.
If we assume that the pressure and temperature remain constant, we can write the relationship as:
V1/n1 = V2/n2
where V1 and n1 are the initial volume and number of molecules, and V2 and n2 are the final volume and number of molecules.
In this case, if the number of molecules increases twofold (n2 = 2n1), the equation becomes:
V1/n1 = V2/(2n1)
Simplifying the equation, we find:
V2 = 2V1
This means that the final volume (V2) will be twice the initial volume (V1) when the number of molecules doubles, assuming the pressure and temperature remain constant.
Therefore,if the number of molecules of a gas increases twofold while the pressure and temperature remain constant, the volume of the gas will also increase twofold.
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As the temperature of water increases its density
a. Increases
b. Decreases
c. Stays the same
Answers
Answer:
B
Explanation:
The warmer the water, the more space it takes up, and the lower its density.
Answer:
The density decreases
Explanation:
The colder the water the closer the particles move together making it denser. The hotter the water the more the particles slow down and move away from each other making the water less dense.
Balance the equation K2SO4 + HNO3 ->KNO3 + H2SO4 what's the final balanced equation
Answers
Answer:
2KNO3 + H2SO4 → K2SO4 + 2HNO3
Explanation:
Hope this helps
What element is represented by the following electron configuration?
1s22s22p63s23p64s23d104p65s24d9
Answers
adetona favour hannah's
Water is a pure substance. Which of the following is true about water?
A. Its compounds can only be chemically separated into the elements that make it up.
B. Its compounds can only be physically separated into the elements that make it up.
C. It is made up of a variety of compounds, each with a different set of properties.
D. It is made up of one element and one compound, each with the same properties.
Answers
How many moles are in 3.27 x 1027 atoms of carbon (C)?
Answers
Answer:
Try:
1. How many atoms are in 6.5 moles of zinc?
6.5 moles 6.02 x 1023 atoms = 3.9 x 1024 atoms
1 mole
2. How many moles of argon are in a sample containing 2.4 x 1024 atoms of argon?
2.4 x 1024 atoms of argon 1 mole = 4.0 mol
6.02 x 1023 atoms
3. How many moles are in 2.5g of lithium?
2.5 grams Li 1 mole = 0.36 mol
6.9 g
4. Find the mass of 4.8moles of iron.
4.8 moles 55.8 g = 267.84 g = 270g
1 mole
Explanation:
i think i did it about right..?? :-(
what are the molar concentrations of sodium and sulfate ions in a solution made by dissolving 18.731 g of na2so4 in water and diluting to 1.33 l?
Answers
The molar concentration of sodium ions is 0.198 M and the molar concentration of sulfate ions is 0.099 M in the given solution.
What is Molar Concentration?
Molar concentration, also known as molarity, is a measure of the amount of a solute dissolved in a given volume of a solution.
Molar concentration (M) = moles of solute / volume of solution in liters
To calculate the molar concentrations of sodium and sulfate ions in the given solution, we need to first determine the number of moles of Na2SO4 present in the solution, and then use stoichiometry to determine the number of moles of each ion present.
The molar mass of Na2SO4 is:
Na2SO4 = 2 Na + SO4
2(23.0 g/mol Na) + 1(32.1 g/mol S) + 4(16.0 g/mol O) = 142.0 g/mol
Therefore, the number of moles of Na2SO4 present in the solution is:
n(Na2SO4) = mass / molar mass
n(Na2SO4) = 18.731 g / 142.0 g/mol = 0.132 moles
Since each mole of Na2SO4 dissociates into two moles of Na+ ions and one mole of SO42- ions, the number of moles of each ion present in the solution is:
n(Na+) = 2 x n(Na2SO4) = 2 x 0.132 = 0.264 moles
n(SO42-) = 1 x n(Na2SO4) = 1 x 0.132 = 0.132 moles
To find the molar concentrations of each ion, we divide the number of moles of each ion by the volume of the solution in liters:
C(Na+) = n(Na+) / V = 0.264 moles / 1.33 L = 0.198 M
C(SO42-) = n(SO42-) / V = 0.132 moles / 1.33 L = 0.099 M
Therefore, the molar concentration of sodium ions is 0.198 M and the molar concentration of sulfate ions is 0.099 M in the given solution.
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Which of the following elements is the most
reactive?
a. Be
b. Mg
c. Ca
d. Sr
Answers
Sr is the most reactive. Correct me if I'm wrong :/
Why is litmus paper useful for detecting the endpoint of the reaction between bromotriphenylmethane and ethanol?.
Answers
The reason why the litmus paper can be used is because the reaction of bromotriphenylmethane and ethanol produces HCl.
What is litmus paper?We define the litmus paper as any piece of paper that have been coated with an organic material such that the dye can interact with an acid or a base and lead to a change in the color of the dye and the paper respectively.
Thus, the color of litmus paper would differ in an acidic and a basic solution as it were. When there is a chemical reaction between bromotriphenylmethane and ethanol we also obtain hydrochloric acid as one of the products and it is able to have some kind of interaction with the litmus paper making it to have a color change.
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Use atomic masses to demonstrate that the balance equation for the formation of iron(III) chloride obeys the law of conservation of mass. Fe + Cl2 → FeCl3
Answers
Using the law of the conservation of mass, the reactions can be shown to obey the law.
What is the law of conservation of mass?We need to know what the law of the conservation of mass says so that we can be able to know how we can be able to apply the law in the proper perspective. We have to know that the law says that total mass of the system would remain constant. The implication of this is that the mass before the reaction would be the same as the mass after the reaction. The mass of the substance must be able to add up in the system that is under study as we have one here.
Mass of the iron = 56 g
Mass of the chlorine = 35.5 g
Balanced reaction equation;
\(2Fe + 3Cl_{2} ---- > 2FeCl_{3}\)
This is the formation of the iron III chloride
Total mass on the right hand side = 2(56) + 6(35.5) = 325 g
Total mass on the left hand side = 2[56 + 3(35.5)] = 325 g
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Using dimensional analysis, how many kilometers are there in 34 inches?
Answers
Answer:
There are many ways to figuring this out: you could use a ruler, a calculator or scrap paper.
Explanation:
This is not an actual flat out answer, but it’s helpful methods to getting the answer the next time you are stuck. Hope you are having a nice day. Bless your heart and soul.
At a certain temperature, 2.50 g Ca reacts completely in 30.0 seconds. The rate of consumption of Ca is
Answers
The rate of consumption of Ca is 0.0833 g/s.
The rate of consumption of Ca can be determined by dividing the mass of Ca consumed (2.50 g) by the time taken for the reaction to occur (30.0 seconds). This gives us a rate of 0.0833 g/s, indicating that 0.0833 grams of Ca are consumed every second during the reaction at the given temperature.
In chemical reactions, the rate of consumption or production of a substance is typically expressed in terms of the change in concentration over time. In this case, since the mass of Ca consumed is given, we can directly calculate the rate of consumption.
It's important to note that the rate of consumption of Ca may vary with temperature and other reaction conditions. The given rate applies specifically to the given temperature and the specific reaction conditions mentioned in the problem.
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Which of the following is a characteristic property of ionic compounds? A.They have low melting points. B.They form hard, brittle crystals. C.They do not form crystals. D.They have low boiling points.
Answers
Answer:
the answer is d
Explanation:
i just did it
The characteristic property of ionic compounds is B. They form hard, brittle crystals.
Ionic bond is a chemical bond formed as the result of transfer of electrons from one atom to another.
Ionic bonds are held by strong electrostatic force. Properties of ionic bonds are:
There form crystals.they have high boiling and melting points.The are soluble in water and insoluble in solvents.They conduct electricity when dissolved in water.Find out more at: https://brainly.com/question/11148793
of the following, the only unpaired dural sinus is the
Answers
The only unpaired dural sinus is the Superior Sagittal Sinus.
The dural sinuses are venous channels located between the layers of the dura mater, the outermost membrane covering the brain. They collect deoxygenated blood and cerebrospinal fluid from the brain and drain it back into the circulatory system.
Typically, the dural sinuses are paired, meaning there are two sinuses on each side of the brain. However, there is one unpaired dural sinus called the Superior Sagittal Sinus. It is located in the midline of the brain, running along the superior margin of the falx cerebri, which is a fold of the dura mater that separates the two cerebral hemispheres.
The Superior Sagittal Sinus receives blood from the cerebral veins and drains into the confluence of sinuses at the back of the skull.
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The only unpaired dural sinus is the superior sagittal sinus. The dura mater, the brain's outermost covering, contains layers that are home to the venous channels known as dural sinuses. Hence option B is correct.
They are essential in the process of returning deoxygenated blood from the brain to the systemic circulation.
Superior sagittal sinus: Located at the superior edge of the falx cerebri, a fold of dura mater that divides the two cerebral hemispheres, the superior sagittal sinus is an unpaired dural sinus. It draws blood from different cerebral veins and empties into a group of sinuses.
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Your question is incomplete, most probably the complete question is :
Of the following, the only unpaired dural sinus is the
A) cavernous sinus.
B) superior sagittal sinus.
C) transverse sinus.
D) carotid sinus.
Sean is moving heavy furniture by sliding it
across the floor. He puts a blanket
underneath the furniture. Why did this help
him?
Answers
Answer:
the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.
Answer:
Blanket underneath the furniture may reduce the kinetic friction
Explanation:
When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.
By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.
Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.
(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)
Stay positive and Take care,
A fellow mate,
Cheers !
Question is in picture! Due in 30 minutes!
Answers
Answer:
wheresthepicture.-
Explanation:
Answer:
don't see a picture
Explanation:
After a hurricane, plant A began to do poorly and plant B began to thrive. After several large rainstorms, plant A began to thrive and plant B began to do poorly. What hypothesis is best supported by this information?
Answers
Answer:Plant A does best in high salinity water and soil, and plant B does best in low salinity water and soil.
Explanation: Because plant A in a hurricane dost bad bot Plant B doest well
Answer:
Plant A does best in high salinity water and soil, and plant B does best in low salinity water and soil
Explanation:
This is due to hurricanes decreasing salinity of water while Rainstorms increase salinity.
Why do chemical reactions happen?
Answers
Answer:
They happen because each element reacting is trying to attain stability
Explanation:
E.g Mg +Cl>MgCl2
lithium (li) bonds with another atom to form a stable molecule with formula lix. based on groups in the periodic table, which atom could represent x?
Answers
Based on the groups in the periodic table, the atom that could represent "x" in the stable molecule LiX, where Li is lithium, would be any atom from Group 17, also known as the halogens.
The halogens include elements such as fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Lithium, being in Group 1, has a single valence electron that it can donate to another atom to form a stable molecule. The halogens in Group 17 have a valence electron deficiency of one, making them suitable candidates to accept the electron from lithium and form a stable LiX molecule.
Therefore, elements like fluorine (F), chlorine (Cl), bromine (Br), iodine (I), or astatine (At) could represent the atom "x" in the LiX molecule.
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Which statement best describes the relationship between the giraffe and the tree shown above?
The giraffe survives by getting food and oxygen from the tree.
* The giraffe survives by getting food and carbon dioxide from the tree.
The tree survives by getting food and oxygen from the giraffe.
The tree survives by getting food and carbon dioxide from the giraffe.
Answers
Answer
a
Explanation:
the giraffe doesn't need carbon dioxide
Two biologists, two chemists, and two physicists go out to dinner and sit at a round table with 6 equally spaced chairs. In how many ways can they sit so that no two scientists of the same type (for example, two biologists) are seated next to each other? (Two seatings that are merely rotations of each other are not considered distinguishably different.)
Why is my approach wrong?
I first seat the biologist to one of the seats, he has one choice. I then seat the other biologist, he has 3 choices. Next, I seat one of the chemists, who has 4 choices. The next chemist then has to choices. Finally, we have the physicists who have no choice but to be in the two remaining seats.
1*3*4*2 = 24.
Why is the answer 32? Please explain, thanks
Answers
By taking into account the different seating possibilities for the biologists, chemists, and physicists, you will find that the total number of valid seating arrangements is indeed 32.
Your approach is incorrect because it does not consider all possible arrangements that satisfy the given conditions. Let's analyze your approach step by step.
You correctly start by seating one biologist, which can be done in 1 way. However, when you proceed to seat the second biologist, you assume that there are 3 choices. This is where the error occurs.
Consider the following possibilities:
If the first biologist is seated at Chair 1, the second biologist cannot be seated at Chair 2 or Chair 6, as they would be sitting next to each other. Therefore, the second biologist can only be seated at Chair 4.
If the first biologist is seated at Chair 2, the second biologist can only be seated at Chair 5.
If the first biologist is seated at Chair 3, the second biologist can only be seated at Chair 6 or Chair 1.
If the first biologist is seated at Chair 4, the second biologist can only be seated at Chair 1.
If the first biologist is seated at Chair 5, the second biologist can only be seated at Chair 2.
If the first biologist is seated at Chair 6, the second biologist can only be seated at Chair 3.
So, there are actually 6 different arrangements for seating the two biologists.
Now, if we continue with your approach, seating the chemists and physicists, we need to consider the additional possibilities that arise due to the constraints of the biologist's seating arrangements.
Therefore, the correct approach would involve considering all possible arrangements that satisfy the given conditions. By taking into account the different seating possibilities for the biologists, chemists, and physicists, you will find that the total number of valid seating arrangements is indeed 32.
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5. A shopping mall wanted to determine whether the more expensive
"Tough Stuff" floor wax was better than the cheaper "Steel Seal" floor wax
at protecting its floor tiles against scratches. One liter of each brand of
floor wax was applied to test sections of the main hall of the mall. The test
sections were all the same size and were covered with the same kind of
tiles. After 3 weeks, the number of scratches in each of the test sections
was counted to observe the wax's effectiveness. Identify Control Group
Answers
Answer:
Control group:
Test section covered with the "Steel Seal" floor wax
Explanation:
In a scientific experiment, the control group is the standard group to which comparison is made, to determine the effect of the experimental agent on the test subjects. In this example, the Steal Seal floor wax is the standard wax being used, and the experimenter wants to see if the "Tough Stuff" wax is better, hence after the treatment with the Tough Stuff wax, the number of scratches observed is compared with the standard wax area and the difference determines if it is a better waxing agent or not.
Edgar accurately measures the air pressure at his location with a barometer. What could his measurement be? Express your answer to the nearest whole number.
Answers
Edgar accurately measures the air pressure at his location with a barometer. His measurement could be using inches of mercury (inHg) and millibars (mb) and the nearest whole number is 29.92 inHg
The measurement of air pressure could be expressed in a variety of units, but the most common units used for air pressure are inches of mercury (inHg) and millibars (mb). One possible measurement of air pressure at Edgar's location could be 29.92 inHg, which is the average air pressure at sea level. This measurement could also be expressed as 1013 mb.
To express the measurement to the nearest whole number, we would round the measurement to the nearest whole number. For example, if the measurement was 29.92 inHg, we would round up to 30 inHg. If the measurement was 1013 mb, we would round down to 1013 mb. So, the measurement of air pressure at Edgar's location could be 30 inHg or 1013 mb, expressed to the nearest whole number.
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What is the volume of 8.8g of carbon dioxide at STP?
Answers
The volume of 8.8g of carbon dioxide at STP is 4.38 L.
At STP, what is 22.4 L?1 mole of any gas will take up 22.4 L of space at standard temperature and pressure (STP). A balanced chemical equation and the Ideal Gas Law can be used to determine the amount or mass of gas consumed or created in a chemical process.
n = m/M
where m is the molar mass of carbon dioxide and M is its mass in terms of molecules.
Considering that the molar mass of carbon dioxide is 44.01 g/mol:
n = 8.8 g / 44.01 g/mol
n = 0.1998 mol
Next, we can plug in the values of n, R, P, and T into the ideal gas law and solve for V:
V = (nRT)/P
V = (0.1998 mol x 0.0821 L·atm/(mol·K) x 273.15 K) / 1 atm
V = 4.38 L
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please help me with this urgently
Answers
Answer:
4 3 2 is the answer because it is balanced that way
ABC, Incorporated, has a beginning receivables balance on January 1st of $670. Sales for January through April are $430, $460, $540 and $560, respectively. The accounts receivable period is 60 days. How much did the firm collect in the month of March
Answers
Accounts refer to financial records that track the flow of money in and out of a company. Receivables are one type of account that represents the money owed to a company by its customers for goods or services provided.
We need to understand the concept of balance and accounts. Accounts refer to financial records that track the flow of money in and out of a company. Receivables are one type of account that represents the money owed to a company by its customers for goods or services provided. The balance of receivables is the amount owed to the company at a specific point in time.
Now, let's calculate the average daily sales for the period of January through April. First, add up the sales for each month ($430 + $460 + $540 + $560 = $1,990). Then divide by the number of days in the period (120 days = $1,990 ÷ 120 = $16.58 per day). Since the accounts receivable period is 60 days, this means that on average, the firm collects payments for sales made 60 days ago.
To determine how much the firm collected in the month of March, we need to look at the sales made in January. Since January sales were $430, this means that in March, the firm collected 60% of that amount ($430 x 0.60 = $258). Therefore, the firm collected $258 in the month of March.
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