The var() function in R is used to calculate sample variance. In those uncommon situations where you want a populace change, utilize the populace mean to work out the example difference and duplicate.
The outcome by (n-1)/n; Take note of the fact that sample variance converges on population variance as sample size increases.
In R, how is variance manually calculated?Find the mean of the sample.Determine the squared difference between the sample mean and each data point.Divide the sum of squares by (i.e., the sample size minus 1) to get the sum of these squared differences.In R, how are variance and standard deviation calculated?R's sample variance and standard deviation are specified by var(y), which tells R to calculate the sample variance of Y by employing n-1 "degrees of freedom," where n is the number of observations in Y. On the other hand, sd(y) tells R to return the sample standard deviation of y by employing n-1 degrees of freedom. sqrt(var(y)) equals sd(y).
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Complete the table with all of the missing information for three different cylinders cubic units
The complete table is answered along with solutions is given above.
What is cylinder?A cylinder has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base.A cylinder may also be defined as an infinite curvilinear surface in various modern branches of geometry and topology.Given is the table as shown in the image.
{ 1 } -
D = 4
R = D/2 = 2
H = 10
Area = πR² = 4π
Volume = πR²h = 40π
{ 2 } -D = 6
R = D/2 = 3
H = 10
Volume = πR²h = 63π
Area = πR² = 9π
Therefore, the complete table is answered along with solutions is given above.
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What is the value of log?.
Value of log 1 is 0 for base 10.
In mathematics, logarithmic functions, also referred to as log functions, are the inverse function of exponentiation. A logarithm, by definition, is a measurement that shows how much a base (fixed number) is raised to get a given number.
The two different kinds of logarithmic functions, in general. The base of the logarithmic function in common logarithmic functions is 10. The base of the logarithmic function in a natural logarithmic function is e.
Hence, the value of log 1 is 0 for base 10.
Correct question :
What is the value of log 1 for base 10?
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HELP ILL GIVE BRAINLY!!!! (LOOK AT THE PICTURE)
Answer:
30 seconds.
Step-by-step explanation:
Think of it this way:
20 seconds has a two and 2/3 has a two.
1/3 must be 10 seconds.
0/3 is 0 seconds.
Which means 3/3, the full length, will take 30 seconds.
How do you construct a triangle XYZ?.
A triangle is a 3 sided Polygon whose internal angle sum up to 180 degrees. It can be constructed by knowing those angles.
To construct a perfect triangle you can follow the following procedure have a brief idea on the angles of the triangle and if the angles are not available get to know about the length of each side of the triangle. If you know the each and every angle of the triangle you can proceed to the construction of triangle. Initially draw a baseline with the given dimension let us say this line is XY. Now from either left or right side of xy with the given angle draw a slanting line even if the length of the line is not known. From this from the other side draw another slanting line from the given angle and extend it up to the point where it touches the previous line. Now you have the triangle created for you. You can name the new point with the letter Z.
Now you have the triangle XYZ constructed.
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Solve the system of equations below. Enter the value of the y value from your solution (in the case of a fraction or decimal solution, round your answer to the nearest tenth).
According to your solution of the given system of equations, the value of y is 7.
What are Systems of equations?Simultaneous equations, a system of equations Two or more equations in algebra must be solved jointly (i.e., the solution must satisfy all the equations in the system). The number of equations must match the number of unknowns for a system to have a singular solution.
There are four methods for solving systems of equations: graphing, substitution, elimination, and matrices.
Given a system of equation y = 2x + 11 and 3x + 2y = 8
From equation 1 we will substitute the value of y in the form of x in equation 2
=> 3x + 2(2x + 11) = 8
=> 3x + 4x + 22 = 8
=> 7x = 8 - 22
=> 7x = -14
=> x = -2
Substitute this value in equation 1
=> y = 2* -2 +11
=> y = -4 + 11
=> y = 7
therefore, the value of the y is 7 from your solution of the system of equations given.
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ANSWER QUICK I WILL MAKE U BRAINLIEST
The answers are 1.67 glucose molecules, 36 glucose molecules, 15 glucose molecules and 8400 times.
What is proportionality?When two ratios are equivalent, they are in proportion. It is an equation or statement used to depict that two ratios or fractions are equal.
Given are some questions regarding production of glucose molecules during aerobic metabolism.
1) 1 glucose molecules produces 30 ATP molecules, how many for 50 ATP molecules :-
Using proportionality, let there be x glucose molecules required to produce 50 ATP molecules,
1 / 30 = x / 50
x = 5/3
x = 1.67
Therefore, there are 1.67 glucose molecules required to produce 50 ATP molecules.
2) 1 glucose molecules produces 6 ATP molecules, how many for 216 ATP molecules :-
Using proportionality, let there be x glucose molecules required to produce 216 ATP molecules,
1 / 6 = x / 216
x = 36
Therefore, there are 36 glucose molecules required to produce 216 ATP molecules.
3) 1 glucose molecules produces 30 ATP molecules, how many for 450 ATP molecules :-
Using proportionality, let there be x glucose molecules required to produce 450 ATP molecules,
1 / 30 = x / 450
x = 15
Therefore, there are 15 glucose molecules required to produce 450 ATP molecules.
4) Since, in one day it's 1200 times an ATP molecule is reused in a human body,
We need to find for a week, there are 7 days in a week,
Therefore, an ATP molecule is reused in a human body for a week = 1200 x 7 = 8400 times.
Hence, the answers are 1.67 glucose molecules, 36 glucose molecules, 15 glucose molecules and 8400 times.
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Is ⅔ equal to ¾?.
No, â =1 is not equals to ¾. Since ¾ is written as 0.75 in fractional notation.
The fraction ¾, which is equivalent to 0.75, is shown by the fractional notation "â...". The bottom number, or denominator, must be multiplied by the top number in order to comprehend this fraction (top number). 4 times 3 in this instance equals 12, which is true. Find the fractional value by first dividing the numerator by the denominator. In this case, the result of 3 divided by 4 is 0.75, or 3/4.
To calculate a fractional value, use the following formula:
Fractional Value: Numerator / Denominator
The numerator is multiplied by the denominator to arrive at 12 when calculating the fractional value of 3/4. Following that, the fractional value is obtained by dividing the numerator by the denominator:
Fractional value equals 3 / 4 = 0.75
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A container of bead contain8 redbead, 7 yellow bead , and green bead. A bead will be drawn from the baket and replace 60 time what i a reaonable prediction for the number of time green or red bead i drawn
A reasonable prediction for the number of times a green or red bead will be drawn from the container of beads, after being replaced 60 times, would be 42.
A reasonable prediction for the number of times a green or red bead will be drawn from the container of beads, after being replaced 60 times, would be close to the proportion of green or red beads in the container. The container has 8 red beads and 6 green beads out of a total of 8 + 7 + 6 = 21 beads. The proportion of green or red beads is (8 + 6) / 21 = 14/21.
We can use this proportion to predict the number of times a green or red bead will be drawn from the container. By multiplying the proportion of green or red beads by the number of times the bead is replaced, we get (14/21) * 60 = 42.
In this scenario, we are using the concept of probability and proportion. The probability of drawing a green or red bead is 14/21, and by multiplying it by the number of trials (60), we get the expected number of times the green or red bead will be drawn. This concept is used in statistics and probability to make predictions based on the available data. It is important to note that this is only a prediction and actual results may vary.
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Find each unknown number.
12 is 150% of what number?
5 is 50% of what number?
10% of what number is 300?
5% of what number is 72?
20 is 80% of what number?
All the required values are given below.
What is a percentage?A ratio or value that may be stated as a fraction of 100 is called a percentage. And it is represented by the symbol '%'.
To find the percentages:
12 is 150% of,
= 12 x 100/ 150
= 8.
5 is 50% of,
= 5 x 100/50
= 10
10% of m number is 300,
m = 300 x 100/ 10
m = 3000
5% of k number is 72,
k = 72 x 100/5
k = 1440
20 is 80% of,
= 20 x 100/80
= 25
Therefore, all the required values are given above.
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What is the solution of pair of equation 2x y 5 and 3x 2y 4?.
The solution of pair of equation 2x + y = 5 and 3x - 2y = 4 is x = 2 and y = 1.
The set of equations given is linear equations that can be solved simultaneously to find the values of variables x and y.
2x + y = 5------->(1)
3x - 2y = 4------->(2)
Multiply equation (1) by 2 and then add it to equation (2)
4x + 2y = 10
3x - 2y = 4
7x + 0 = 14
7x = 14
x = 2
Putting x = 2 in (1),
2(2) + y = 5
y = 5 - 4 = 1
Therefore, the values of x and y obtained are 2 and 1, respectively.
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Find the magnitude and direction of the vector <4, 2>. Round angles to the nearest degree and other values to the nearest tenth.
The magnitude and direction of vector <4, 2> are 2√5 and 26.6°, respectively.
How to calculate the magnitude and direction of a vector
In this problem we find the representation of a two-dimension vector, that is, a vector of the form <x, y>. Vectors are described both by magnitude and direction:
Magnitude - This can be found by Pythagorean theorem:
r = √(x² + y²)
Direction - This can be determined by following inverse trigonometric function:
θ = tan⁻¹ (y / x)
Where θ is expressed in degrees.
If we know that x = 4 and y = 2, then the magnitude and direction of the vector <4, 2> are, respectively:
r = √(4² + 2²)
r = √20
r = 2√5
θ = tan⁻¹ (2 / 4)
θ = tan⁻¹ (1 / 2)
θ ≈ 26.565°
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Martin ha 0. 50 cent Sara ha 10 time a much a Martin Jon ha one tenth a much money a Martin
Sara have 5 cents and jon have 0.05 cents with him.
What is fraction?A fraction is a number that represents a part of a whole or a ratio of two numbers. It is written in the form of "a/b" where a is the numerator and b is the denominator. The numerator represents the number of parts that are being considered and the denominator represents the total number of parts in the whole. The fraction can be simplified by dividing both numerator and denominator by their greatest common factor.
Given Martin have 0.5 cents and it is mentioned that Sara have 10 times as much money as marting
so Sara have 10*0.5 cents
=> 5 cents
so sara have 5 cents
Given that jon have 1/10 fraction as much money as Martin have
so jon have 1/10 *0.5
=> 0.1*0.5
=> 0.05 cents
so Jon have 0.05 cents.
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Complete question:
Martin ha 0. 50 cent Sara ha 10 times as much as Martin and Jon has one tenth as much money as Martin . How many cents Sara and jon have
hi guys can you guys see if question a and b is correct or not
Answer:
a = 97° , b = 19°
Step-by-step explanation:
the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
(a)
a is an exterior angle of the triangle , then
a = 40° + 57° = 97°
(b)
57° is an exterior angle of the triangle , then
b + 38° = 57° ( subtract 38° from both sides )
b = 19°
(-3x + 5) - (-7x + 2)
Answer:
[tex] \sf \: 4x + 3 [/tex]
Step-by-step explanation:
Given expression,
→ (-3x + 5) - (-7x + 2)
Let's simplify the expression,
→ (-3x + 5) - (-7x + 2)
→ -3x + 5 + 7x - 2
→ (-3x + 7x) + (5 - 2)
→ (4x) + (3)
→ 4x + 3
Hence, the answer is 4x + 3.
10x +7
because minus and minus equals plus 7x + 3x equals 10x and 2 plus 5 is 7
How do log graphs work?.
Answer:
On a logarithmic scale, numbers on the Y-axis don't move up in equal increments but instead each interval increases by a set factor – it's often 10 but could be a factor of 3 or 350 or 3,500, anything at all.
Step-by-step explanation:
What is the standard form of Y =- 5x 3?.
Answer: y = 5x + 3 in standard form
Step-by-step explanation:
please graph y≤ 2x-3
I GOT A B+!!!!!!
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Ben can buy 5 notebooks for $6.75 at Store A or 3 notebooks for $4,50 at Store B Which store offers the better value
The store that offers the better value based on the unit rate is Store A.
What is the unit rate?The unit rate is the ratio of one item to the whole item.
The unit rate represents the average of a data set.
It is computed by dividing the total value by the number of units.
The cost of 5 notebooks at Store A = $6.75
The unit rate of notebooks at Store A = $1.35 ($6.75/5)
The cost of 3 notebooks at Store B = $4.50
The unit rate of notebooks at Store B = $1.50 ($4.50/3)
Thus, using the unit rate as the basis of consideration, we can conclude that Store A offers Ben a better value than Store B.
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What do you divide by 260 to get a 100
Answer:
2.6
Step-by-step explanation:
260÷x=100
260/x=100
260=100x
x=2.6
Jolin and Michael race over 50 metres John runs so that it takes at a seconds to run 1 metre and Michael runs so that it takes & seconds to run 1 metre. Michael wins the race by second The next day they again race over 50 metres but Michael gives John a 3-metre start so that Johm runs 47 metres. Michael wins this race by 0. 1 seconds. Find the values of a and b and the speed us which Michaej ro
The required values of a and b are approximately 15.4 and 14.6, respectively, and Michael's speed is approximately 14.6 meters per second.
Following the given condition
Race 1: Michael wins by 1 second, so time is given as:
[tex](50/b)=(50/a)+1[/tex]
Race 2: Michael wins by 0.1 seconds over 47 meters, so time is given as:
[tex]47/a+0.1=50/b[/tex]
From Race 1, we get [tex]a=b+50/b-50.[/tex]
Substitute the value of a in terms of b into the Race 2 equation:
[tex]\dfrac{47}{b+50/b-50}+0.1-\dfrac{50}{b}[/tex]
Now, solve for b:
[tex]b\approx14.6\\[/tex] (discard the negative solution as speed cannot be negative)
Now, calculate the value of a using the equation from Race 1:
[tex]a=b+50/b-50 \approx15.4[/tex]
Therefore, the values of a and b are approximately 15.4 and 14.6, respectively, and Michael's speed is approximately 14.6 meters per second.
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Simplify: 2 \left( 5 + 3 \mathrm{x} \right) + \left( \mathrm{x} + 10 \right)2(5+3x)+(x+10)
The simplified expression of 2(5+3x)+(x+10) is 7x + 20
How to simplify the expressionFrom the question, we have the following parameters that can be used in our computation:
2(5+3x)+(x+10)
Open the brackets
so, we have
10 + 6x + x + 10
Evaluate the like terms
7x + 20
Hence, the expression is 7x + 20
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Cyrus plans a design to paint on his bass drum. He
starts with figure P and translates it 3 units to the
right to form figure P'. Then he reflects figure P'
across the y-axis to form figure P". Then Cyrus dilates
figure P" using a scale factor of 2 to form figure P"".
The center of dilation is at the origin. Draw figures
P', P", and P"" in the coordinate plane.
The figures P', P", and P"" have been drawn below in the coordinate plane. The solution has been obtained using transformation.
What is transformation?
An operation that manipulates a polygon or other two-dimensional object on a plane or coordinate system is known as a transformation.
The shape in two dimensions before any alteration is known as a pre-image or inverse image. The shape after transformation is the image.
Cyrus is planning a design to paint on his bass drum.
He starts with figure P and translates it 3 units to the right to form figure P'. This means he moves 3 units closer to the y-axis.
Then he reflects figure P' across the y-axis to form figure P".
Then he dilates figure P" using a scale factor of 2 to form figure P"". This means that the figure is twice of P".
The center of dilation is at the origin.
From this, the below figure has been obtained.
Hence, the figures of P', P", and P"" in the coordinate plane have been constructed.
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33. The value of a sports car is modeled by the expon ential function graphed at the right. After how many years will the value of the car be less than one-half of its original value?
Based on the given exponential graph, the value of car will be decreased by half after 2 years.
Exponential Function -The exponential function is a type of mathematical function that can be used to determine if anything is increasing or decreasing exponentially, such as population, money, or price.
Jonathan was reading a news story about the most recent bacterial growth study.
He had read that one bacteria had been used in an experiment. The bacterium doubled in size and had two by the end of the first hour. The number was four after the second hour.
he number of microorganisms was growing hourly. If this pattern holds, he wondered how many bacteria there will be in 100 hours. When he asked his teacher about the same thing, the concept of an exponential function was the response he received.
The value of y at x = 0 is 80,
So, the initial cost of car is 80 thousand dollars,
half the original value will be 40 thousand dollars,
Value with respect to 40 is 2 on the x - axis on the graph.
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Complete Question -
What is the degree of the sum of a polynomial?.
If two polynomials have different degrees, the degree of the sum is the maximum of the degrees of each polynomial.
A polynomial is described as an expression that consists of variables, constants, and exponents, which might be mixed with the use of mathematical operations along with addition, subtraction, multiplication, and department (No division operation by a variable).
In arithmetic, a polynomial is an expression that includes indeterminates and coefficients, that entail best the operations of addition, subtraction, multiplication, and fine-integer powers of variables. An instance of a polynomial of an unmarried indeterminate x is x² − 4x + 7.
Polynomials are sums of phrases of the form k⋅xⁿ, in which okay is any wide variety and n is a positive integer. for example, 3x+2x-5 is a polynomial. advent to polynomials.
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On a map two points are 7cn apart the map has a scale of 1:10000 what is the actual distance
Answer:
700 meters.
Step-by-step explanation:
The actual distance between the two points can be determined by using the scale of the map. If the scale of the map is 1:10,000, it means that one unit of measurement on the map represents 10,000 units of the same measurement in reality.
Therefore, if the distance between the two points on the map is 7cm, the actual distance is 7cm * 10,000 = 70,000cm or 700 meters.
So, the actual distance between the two points is 700 meters.
A tiling pattern i defined by the pattern rule equation n=53pn=53p, where pp i the poition number and nn i the number of tile. How many tile would there be in poition 26?
Thus, position 26 would have 1378 tiles.
Pattern rule equation:
A pattern rule equation is a mathematical formula that describes how a pattern is created. It defines the relationship between the position number (p) and the number of tiles (n) in the pattern.
The pattern rule equation is a useful tool to predict the number of tiles in a certain position, for example, position 26 as I mentioned in my previous answer.
It's also useful to predict the total number of tiles in a pattern or to identify the position number of a specific number of tiles.
In the pattern rule equation n = 53p, n is the number of tiles and p is the position number. To find the number of tiles in position 26, we can substitute 26 for p in the equation:
n = 53p
n = 53(26)
n = 1378
So there would be 1378 tiles in position 26.
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Ayudenme
Para la ornamentacion de su casa Jessica comprará una planta solo de hojas verdes un tipo de geranio con imangen plis
To decorate her house, Jessica buys this plant which is Boston Fern.
Sure! A plant with green leaves that Jessica can consider buying is a Boston Fern. Boston Ferns are known for their lush, bright green fronds that provide a beautiful, natural touch to any indoor space. They are popular houseplants because they are relatively easy to care for and can purify the air.
To care for a Boston Fern, place it in a location with indirect light and maintain a consistent level of moisture in the soil, avoiding letting the soil dry out completely or become waterlogged. They also benefit from regular misting to increase humidity levels.
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Flagpole The world's tallest unsupported flagpole is a 282-ft-tall steel pole in
Surrey, British Columbia. The shortest shadow cast
by the pole during the year
is 137 ft long. To the nearest degree, what is the angle of elevation of the sun
when the shortest shadow is cast?
Check the picture below.
[tex]tan(\theta )=\cfrac{\stackrel{opposite}{282}}{\underset{adjacent}{137}}\implies \theta =tan^{-1}\left( \cfrac{282}{137} \right)\implies \theta \approx 64^o[/tex]
Make sure your calculator is in Degree mode.
2. When Madison got her kitten, Fluffy, he weighed
787.37 grams. He now weighs 2,085.8 grams more than
he did when Madison first brought him home. How much
does Fluffy weigh now?
Using subtraction, weight put on by kitten is 1,298.43.
When we subtract from the group, the total number of items falls or gets less. The minuend, subtrahend, and difference are the elements of a subtraction problem.
It involves calculating the difference between two numbers. The icon looks like this: (minus). In this operation, we take a number and divide it by a smaller number. In other words, we divide one integer by another.
Weight of kitten when Madison brought her = 787.37 grams
Current weight of Madison = 2085.8 grams
Using subtraction,
Total weight Kitten put on = (2085.8 - 787.37)grams
= 1,298.43
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