Answer:
24
Step-by-step explanation:
Answer:
C. 20
Step-by-step explanation:
To find out how many students per teacher, we can divide the total number of students by the total number of teachers:
240 students / 12 teachers = 20 students per teacher.
Therefore, the answer is C. 20.
Solve for x. Round to the nearest tenth, if necessary.
From the triangle he value of x is given as 13 units
What is trigonometric ratio of angles?Trigonometrical ratio of angles is a measure used to determine the sign of an angle. It can be calculated by finding the quadrant in which the angle (n ∙ 90° + θ) or (n ∙ 90° - θ) lies
The ratios are given as SOH CAH TOA
Where
S = sine = opposite/Hypothenuse
C = cosine = Adjacent/Hypothenuse
T = Tangent = Opposite/Adjacent
Tan 59 = x/7.7
x = 7.7 * tan59
Finding the value of tan59
x = 7.7 * 1.6643
x = 12.82 units
In conclusion, the value of x = 13 units
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t is commonly believed that the mean body temperature of a healthy adult is . you are not entirely convinced. you believe that it is not . you collected data using 40 healthy people and found that they had a mean body temperature of with a standard deviation of . use a 0.05 significance level to test the claim that the mean body temperature of a healthy adult is not . a) identify the null and alternative hypotheses?
H0 represents the null hypothesis,
H1 represents the alternative hypothesis,
μ represents the population mean body temperature, and
μ0 represents the claimed mean body temperature.
We are testing the claim that the mean body temperature of a healthy adult is not equal to a certain value. Let's denote the claimed mean body temperature as μ0.
Null Hypothesis (H0):
The mean body temperature of a healthy adult is equal to μ0.
Alternative Hypothesis (H1):
The mean body temperature of a healthy adult is not equal to μ0.
So the null hypothesis states that there is no significant difference between the claimed mean body temperature (μ0) and the actual mean body temperature, while the alternative hypothesis suggests that there is a significant difference.
In symbolic form:
H0: μ = μ0
H1: μ ≠ μ0
The question, the specific value for the claimed mean body temperature was not provided, so we'll refer to it as μ0 without a numerical value.
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a coin is tossed 25 times. estimate the chance of getting 12 heads and 13 tails.
To estimate the chance of getting 12 heads and 13 tails when a coin is tossed 25 times, we can use the binomial probability formula.
The binomial probability formula is given by:
P(x) = (nCx) * p^x * q^(n-x)
Where:
P(x) is the probability of getting x successes,
n is the total number of trials,
x is the number of desired successes,
p is the probability of success on a single trial,
q is the probability of failure on a single trial, which is equal to 1 - p,
and (nCx) is the number of combinations of n items taken x at a time.
In this case, n = 25, x = 12 (number of heads), p = 0.5 (since the coin is fair), and q = 1 - p = 0.5.
Using the binomial probability formula, we can calculate the probability of getting 12 heads and 13 tails as:
P(12 heads) = (25C12) * (0.5^12) * (0.5^13)
Calculating this expression will give us the estimated chance of getting 12 heads and 13 tails when a coin is tossed 25 times.
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If the area of a semi - circle is 308 cm square, calculate its radius. ( use pi = 22/7)
Answer:
The answer for radius is 13cm
Step-by-step explanation:
Area of semi circle=1/2pir²
308=1/2×22/7×r²
308=22r²/14
22r²=4312
divide both sides by 22
22r²/22=4312/22
r²=196
take the square root of both sides
√r²=√196
r=14cm
What is the scale factor of AXYZ to AUVW?
60
56
83
90
75
41
56
6
83
7.5
9/W
41
The scale factor is 10.
Given that are two triangles which are similar, we need to find the scale factors,
Scale factor is defined as the number or the conversion factor which is used to change the size of a figure without changing its shape. It is used to increase or decrease the size of an object.
The scale factor can be calculated if the dimensions of the original figure and the dimensions of the dilated (increased or decreased) figure are known.
For example, a rectangle has a length of 5 units and a width of 2 units. Now, if we increase the size of this rectangle by a scale factor of 2, the sides will become 10 units and 4 units, respectively.
Hence, we can use the scale factor to get the dimensions of the changed figures.
The scale factor (k) = ratio of the corresponding sides,
So,
k = XY / VU
k = 60 / 6
k = 10
Hence the scale factor is 10.
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A control chart is a visual representation of the various states in a process O a False O b. True
A control chart is a visual representation of the various states in a process. The answer is b. True. Control charts are used in quality control and process improvement to monitor and analyze the performance of a process over time.
b. True. A control chart is a graphical tool used to monitor the performance of a process over time. It is a visual representation of the data collected from the process and helps in identifying any patterns or trends that may occur. The chart typically consists of a central line representing the average or target value, and upper and lower control limits representing the acceptable range of values for the process. The data is plotted on the chart, and any points that fall outside the control limits indicate a process that is out of control and may require further investigation. Control charts are commonly used in industries such as manufacturing, healthcare, and finance to ensure that processes are running smoothly and to identify any potential issues early on. Overall, control charts provide a powerful way to monitor and manage processes in a systematic manner.
They help to identify trends, patterns, and variations that may indicate potential issues, allowing for timely corrective actions to be taken.
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If you paid $5. 69 as sales tax and you know the sales tax rate is 9. 5%, how much was the subtotal?
If the tax rate at this restaurant is 9. 5% and some other person’s sales tax is $5. 69 then their subtotal is $65.58
Here, some other person’s sales tax is $5. 69
Consider that for the amount of 'p' dollars, the sales tax is 9. 5% is $5. 69
Here, the tax rate at this restaurant is 9.5%
This means, 9.5 percent of m dollars is $5. 69
Using percentage formula,
m × (9.5 / 100) = 5. 69
m × 9.5 = 5. 69× 100
m × 9.5 = 569
m = 59.89 dollars
So, their subtotal would be,
m + sales tax
= 59.89 + 5. 69
= 65.58 dollars
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mr. singh had three sheets of stickers. he gave 20 stickers from each sheet to his students and has 12 total stickers and solve an equation to find the total number of stickers s there were originally on each sheet.
Mr. Singh had three sheets of stickers. He gave 20 stickers from each sheet to his students and has 12 total stickers. The total number of stickers that there were originally on each sheet is 24.
Let the number of stickers on one sheet be 'a'
So, the number of stickers on three sheets = 3a
Number of stickers given from each sheet = 20
So, total number of stickers given from three sheets = 3 × 20 = 60
Number of stickers left with Mr. Singh = 12
Therefore,
3a - 60 = 12
3a = 12 + 60 = 72
a = 72/3
a = 24
So, the total number of stickers that were there originally on the sheet is 24 and Mr. Singh had three sheets of stickers. He gave 20 stickers from each sheet to his students and has 12 total stickers.
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2 sin (x - y)
cos (x + y) cos (x - y)
= cotx- cot y
Two fair, six-sided dice both have sides labelled 1, 2, 3, 4, 5 and 6 Both dice are rolled and the sum of the scores on the two dice is recorded. What is the probability that the recorded score is more than 10? a) 2/12 b) 3/12 c) 3/36 d) 6/36
Answer:
C) 3/36----------------------
We need to determine the total number of outcomes and the number of favorable outcomes.
Total outcomes:
Each die has 6 sides, so there are 6 x 6 = 36 possible outcomes when rolling two dice.Favorable outcomes:
To get a sum greater than 10, the only combinations are (5,6), (6,5), and (6,6). There are 3 favorable outcomes.To find the probability, divide the number of favorable outcomes by the total number of outcomes:
Probability = (favorable outcomes) / (total outcomes)Probability = 3/36 = 1/12The matching choice is C.
Find the measure of Arc BED
180 degrees
142 degrees
218 degrees
72 degrees
The measure of arc BED in the circle is calculated as:
m(BED) = 218 degrees.
How to Find the Measure of an Arc?For us to be able to find the measure of the arc, we need to recall that the measure of the intercepted arc is the same as the central angle measure opposite it.
Arc BED will therefore have the same measure as that of the central angle, therefore:
measure of arc BED = 360 - 52 - 90 [note that arc DC is equal to 90 degrees while arc BC is equal to 52 degrees]
Measure of arc BED = 218 degrees.
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the sum of the height and radius of a right circular cylinder is 9 cm. If the surface area of the cylinder is 54 cm squared. Then find the height of the cylinder.
The height of the cylinder whose area is given would be =7.6cm.
How to calculate the height of a cylinder?To calculate the height of a cylinder, the formula for the area of cylinder should be used and it is given below as follows;
Surface area of cylinder = 2πr²+2πhr
This can also be written as = 2πr(h+r)
surface area = 54cm²
h+r = 9cm
r = ?
54 = 2×2.14×r(9)
54 = 38.52r
r = 54/38.52
r = 1.4
h = 9-1.4 = 7.6cm
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Halp me this the question
Answer:
26 + 22 + ? = 52
Step-by-step explanation:
52 horses in total.
26 brown and 22 black. 26 + 22 = 48.
52 - 48 = 4 (number white horses)
a researcher believes that women today weigh less than in previous years. to investigate this belief, she randomly samples 41 adult women and records their weights. the scores have a mean of 111 lbs. and a standard deviation of 12.4. a local census taken several years ago shows the mean weight of adult women was 115 lbs. the obtained value of the appropriate statistic for testing h0 is
The given problem is concerned with hypothesis testing. The researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The obtained value of the appropriate statistic for testing H0 is t= -2.42.
Given that,
Population mean µ = 115 lbs
Sample mean x = 111 lbs
Sample size n = 41
Standard deviation σ = 12.4 lbs
hypothesis testing
Null hypothesis H0: µ = 115 lbs
Alternate hypothesis H1: µ < 115 lbs
Since the population standard deviation is unknown and the sample size is less than 30, we use a t-distribution to test the hypothesis. The formula for the t-test statistic is,
t= (x- µ)/(s/√n)
Where, x = sample mean, µ = population mean, s = sample standard deviation, and n = sample size
Substituting the given values in the above formula, we get,
t= (111 - 115) / (12.4/ √41)t= -4 / 1.93t= -2.07
The obtained value of the appropriate statistic for testing H0 is t= -2.07.
The calculated t-value is compared with the critical value of t with degrees of freedom (df) = n-1 = 41-1 = 40 at the desired significance level. If the calculated t-value is less than the critical value of t, we reject the null hypothesis. Otherwise, we fail to reject the null hypothesis.
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t and w are inversely proportional.
The equation of proportionality is t = 4/w
How will the value of t change if the value
of w is multiplied by 6?
Step-by-step explanation:
If t and w are inversely proportional, it means that as one variable increases, the other variable will decrease by the same factor. In this case, we have the equation t = 4/w, which means that if we multiply w by a certain factor, t will be divided by the same factor.
If we multiply w by 6, the new value of w will be 6 times the original value:
w' = 6w
To find the new value of t, we can substitute w' into the equation:
t' = 4/w'
t' = 4/(6w)
t' = 2/3w
So we see that t has been divided by 6/1 = 6. Therefore, the value of t will decrease by a factor of 6 if the value of w is multiplied by 6.
what is the shannon index value for an area in which only a single species is present?
The Shannon index value for an area in which only a single species is present is zero. This is because the Shannon index takes into account both species richness (the number of different species present) and evenness (the relative abundance of each species).
The Shannon Diversity Index (H') is used to measure the diversity of species in a given area and is calculated as H' = -Σ(pi)ln(pi), where pi is the proportion of individuals belonging to the i-th species. In an area where only a single species is present, pi would equal 1, meaning that there is no variation in species and only one species is observed.
Therefore, ln(pi) would be 0, and the entire summation would be equal to 0. As a result, the Shannon Diversity Index for an area with only one species would be 0, indicating no diversity in the community.
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Find the amplitude and period of the function f(x)= -2 sin x. Show work
The period of the function f(x) = -2 sinx is 2π. So to summarize, the amplitude of the function is -2 and the period is 2π.
The general form of a sinusoidal function is f(x) = A sin(Bx - C) + D, where A is the amplitude, B determines the period, C is the phase shift, and D is the vertical shift.
For the function f(x) = -2 sinx, we can see that the amplitude (A) is -2, since the coefficient of the sin function is -2. The amplitude represents the maximum distance the graph oscillates above and below the midline, so in this case, the graph oscillates between y = -2 and y = 2.
To find the period (B), we can use the formula T = 2π/B, where T is the period and B is the coefficient of x in the sin function. In this case, B = 1, so T = 2π/1 = 2π.
Therefore, the period of the function f(x) = -2 sinx is 2π. So to summarize, the amplitude of the function is -2 and the period is 2π.
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During a blizzard, the town of Somerville got 60 centimeters of snow in one day! The next few days were sunny, so 55 millimeters of snow melted. But then, Somerville got another 120 millimeters of snow. How many centimeters of snow does Somerville have now?
Somerville now has 66.5 centimeters of snow.
In the initial blizzard, the town of Somerville got 60 centimeters of snow in one day. After a few sunny days, 55 millimeters of snow melted. To convert millimeters to centimeters, we divide by 10. Therefore, 55 millimeters of snow is equal to 5.5 centimeters of snow that melted.
So, the total amount of snow that was left after the sunny days was 60 - 5.5 = 54.5 centimeters of snow.
But then, Somerville got another 120 millimeters of snow. Converting millimeters to centimeters by dividing by 10, we get that 120 millimeters of snow is equal to 12 centimeters of snow.
To find out how many centimeters of snow Somerville has now, we add the remaining snow from the initial blizzard (54.5 centimeters) to the new snowfall (12 centimeters).
Therefore, Somerville now has 66.5 centimeters of snow.
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find the S with the given dimensions
Answer:
The area of the triangle is equal to half the product of its base and height. In this case, the base is 6 дм and the height is 8 дм. Therefore, the area of the triangle is
S = \frac{1}{2}(6)(8) = 24 дм^2
Step-by-step explanation:
how do i solve this???
Answer:
The answer is down below
Step-by-step explanation:
y=x²-3x-1
y=mx+c=x²-6x+4-(x²-3x-1)
y=3x+3
where slope=3
y-intercept =3
A shop employs eight men and two women. The mean weekly wage of the ten employees is £396.
The mean weakly wage of the 8 men is £400.
Calculate the mean weekly wage of the 2 women.
Answer:
The mean weekly wage for the two women is £380.
Step-by-step explanation:
We can use the weighted mean formula to solve this problem.
Firstly, we calculate the total weekly wage for the ten employees by multiplying the mean weekly wage by the total number of employees:
Total weekly wage = Mean weekly wage x Number of employees
Total weekly wage = £396 x 10
Total weekly wage = £3,960
We can then subtract the total weekly wage for the eight men to find the total weekly wage for the two women:
Total weekly wage for 2 women = Total weekly wage - Total weekly wage for 8 men
Total weekly wage for 2 women = £3,960 - (£400 x 8)
Total weekly wage for 2 women = £3,960 - £3,200
Total weekly wage for 2 women = £760
Now, we can calculate the mean weekly wage for the two women by dividing their total weekly wage by the number of women:
Mean weekly wage for 2 women = Total weekly wage for 2 women / Number of women
Mean weekly wage for 2 women = £760 / 2
Mean weekly wage for 2 women = £380
Therefore, the mean weekly wage for the two women is £380.
value of x,in the given figure
what values are specified by the null hypothesis for the chi-square test for goodness of fit? a. proportions for the entire population. b. proportions for the sample. c. frequencies for the entire population. d. frequencies for the sample.
The null hypothesis in a chi-square test for goodness of fit involves frequencies for the entire population, not just proportions or frequencies for the sample. c.
In a chi-square test for goodness of fit, the null hypothesis specifies the expected frequencies or counts for different categories in the entire population being studied.
The test compares the observed frequencies in the sample to the expected frequencies under the null hypothesis to determine if there is a significant difference between the observed and expected distributions.
The chi-square test for goodness of fit assesses whether the observed frequencies in the sample deviate significantly from the expected frequencies specified by the null hypothesis for the entire population. The test evaluates if the observed data supports or contradicts the null hypothesis, which assumes that the observed frequencies follow a specific distribution or proportions.
The null hypothesis in a chi-square test for goodness of fit defines the predicted frequencies or counts for various categories in the total population under investigation.
The test determines if there is a significant discrepancy between the observed and predicted distributions by comparing the observed frequencies in the sample to the anticipated frequencies under the null hypothesis.
The chi-square test for goodness of fit determines if the sample's observed frequencies differ noticeably from the null hypotheses' predicted frequencies for the overall population.
The null hypothesis, which holds that the observed frequencies follow a particular distribution or proportions, is assumed in the test, and it is determined if the observed data supports or refutes it.
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Given the right triangle shown below, which of the following expressions would correctly calculate its
perimeter?
(1) 15+15 sin 42 +15 cos 42"
15
cos 42°
(3) 15+15 tan 42 +15 sin 42°
15
cos 42
(2) 15+ 15
sin 42
(4) 15+15 tan 42° +
42°
15
The expression that correctly calculate the perimeter of the right triangle is:
15 + 15tan42° + 15/cos42°
How to determine which of the expressions would correctly calculate the perimeter of the right triangle?Trigonometry deals with the relationship between the ratios of the sides of a right triangle with its angles.
The perimeter of the right triangle is the sum of all the sides of the triangle.
We have:
15 units
Let the side opposite angle 42° be x. Thus,
tan 42 = x/15
x = 15 tan 42°
For the hypotenuse side (h):
cos 42° = 15/h
h = 15/cos 42°
Perimeter = 15 + x + h
Perimeter = 15 + 15tan42° + 15/cos42°
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Complete Question
Check the attached image
1.True or false: all variable terms can be combined, regardless of exponents
2. Polynomials in standard form…
a. Are in ascending order of monomial degrees
b. Are in descending order of monomial degrees
c. Are in whatever order in which they are given
Answer:
b
Step-by-step explanation:
Standford form is highest exponent to lowest
Find the volume of the figure. Use 3.14 for .
◄20 cm→
24 cm
The volume of the cone is 251.20 cubic centimeters if the diameter of the cone is 20 cm and the height of the cone is 24 cm.
The diameter of the cone = 20 cm
The radius of the cone = diameter /2 = 20/2 = 10cm
The height of the cone = 24 cm
The volume of the cone is calculated by using the formula is:
V = (1/3)*π* [tex]r^2[/tex] *h
Substituting the values, we get:
V = (1/3)* π * [tex]r^2[/tex] *h
V = (1/3) * π * [tex](10 cm)^2[/tex] * (24 cm)
V = (1/3) *π * ([tex]100 cm^2[/tex]) * (24 cm)
V = 251.20 cubic centimeters.
Therefore, we can conclude that the volume of the cone is 251.20 cubic centimeters.
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if p and n are positive integers and p > n, what is the remainder when p2 – n2 is divided by 15 ?
If p and n are positive integers and p > n. 0, 1, 5, 6, 9, and 11 are the remainders when p² - n² is divided by 15.
To find the remainder whilst (p² - n²) is split with the aid of 15, we are able to think of the expression p² - n² the usage of the distinction of squares method.
The distinction of squares formula states that a² - b² can be factored as (a + b)(a - b).
Applying this method to p² - n²;
p² - n² = (p + n)(p - n)
Now, we recognize that p and n are positive integers and p > n. This way that p + n and p - n are both advantageous integers.
To locate the remainder whilst (p^2 - n^2) is split through 15, we will take a look at the remainders of (p + n) and (p - n) when divided with the aid of 15.
Let's don't forget the viable remainders when dividing an integer by means of 15:
zero, 1, 2, 3, 4, five, 6, 7, eight, 9, 10, 11, 12, 13, 14
Since p + n and p - n are both high-quality integers, the feasible remainders when dividing them by way of 15 could be:
zero, 1, 2, three, 4, 5, 6, 7, eight, 9, 10, eleven, 12, thirteen, 14
Now, permits take into account the viable products of (p + n) and (p - n) while the remainder is multiplied:
0 * 0 = 0
1 * 14 = 14
2 * 13 = 26 (that's equal to eleven modulo 15)
3 * 12 = 36 (that's equal to six modulo 15)
4 * eleven = 44 (that's equivalent to fourteen modulo 15)
5 * 10 = 50 (which is equivalent to five modulo 15)
6 * 9 = 54 (that is equivalent to nine modulo 15)
7 * eight = 56 (that's equal to 11 modulo 15)
8 * 7 = 56 (that is equivalent to eleven modulo 15)
9 * 6 = 54 (that's equal to nine modulo 15)
10 * 5 = 50 (which is equivalent to 5 modulo 15)
11 * 4 = 44 (that's equivalent to fourteen modulo 15)
12 * 3 = 36 (that is equal to 6 modulo 15)
13 * 2 = 26 (that's equivalent to 11 modulo 15)
14 * 1 = 14
From the above merchandise, we will see that (p + n)(p - n) will have remainders of zero, 1, five, 6, 9, and eleven when divided via 15.
Therefore, the feasible remainders whilst () is split through 15 are 0, 1, 5, 6, nine, and 11.
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Help please DUE TONIGHT ! You have been contracted to paint the grain silo pictured below find the combined surface area of the top and sides of the sail to determine the amount of paint needed for the job note there is no need to paint the bottom of the silo as it is resting on the ground the height of the right cylinder is twice it’s diameter round ur answer to the nearest whole number
The curved surface area of cylinder is,
⇒ 90π m²
We have to given that;
the height of the right cylinder is twice it’s diameter.
Hence, We get;
Diameter = 12 / 2 = 6 m
So, Radius = 6 / 2 = 3 m
So, Lateral surface area of cylinder is,
⇒ 2πrh
⇒ 2π × 3 × 12
⇒ 72π m
And, Curved surface area is,
⇒ 2πr²
⇒ 2π × 3²
⇒ 18π m
Thus, The curved surface area is,
⇒ 72π + 18π
⇒ 90π m²
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Pressure varies directly with the depth. When the pressure is 320 grams per square meter the
depth is 480 meters. What is the depth, in meters, when the pressure is 2.6 grams per square
meter? (Round to the nearest tenth)
A 1.7 grams
B 1.9 grams
C 3.7 grams
D 3.9 grams
When the pressure is 2.6 g/m² then the depth is 3.9 m.
Given that the pressure varies directly with the depth. When the pressure is 320 g/m² the depth is 480 m.
We need to find the depth if the pressure is 2.6 g/m².
So, here we will use the concept of proportionality,
Let the unknown depth be x,
So,
320 / 480 = 2.6 / x
2 / 3 = 2.6 / x
2x = 7.8
x = 3.9
Hence when the pressure is 2.6 g/m² then the depth is 3.9 m.
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what’s is the surface area of the triangular prism?
The total surface area of the triangular prism is 636 square meters
Finding the surface area of the triangular prismFrom the question, we have the following parameters that can be used in our computation:
The triangular prism
The surface area of the triangular prism from the net is calculated as
Surface area = sum of areas of individual shapes that make up the net of the triangular prism
Using the above as a guide, we have the following:
Area = 1/2 * 10 * 24 * 2 + 11 * 26 + 10 * 11
Evaluate
Area = 636
Hence, the surface area is 636 square meters
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