According to the preceding statement, then standard deviation becomes 4.19 if the sample variance is given as 17.56.
How to interpret a standard deviation?A measurement of a data set's departure from the mean is referred to as "standard deviation" (or ""). Whereas a large variance shows that the numbers are more spread, a lower number suggests that its data are clustered around the mean. The standard deviation is a measure of how volatile your collected data is generally. It displays the standard deviation for every score with respect to the mean.
We must consider the square root of both the sample covariance matrix to determine the standard deviation.
= √17.56
≈ 4.19
Hence, their standard deviation is around 4.19
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A right square pyramid has the dimensions shown below.
l = 5 cm
h = 3 cm
s = 8 cm
What is the volume of the pyramid? Include correct units.
Show all your work.
The vοlume οf the pyramid is 64 cubic centimeters (cm^3).
What is the vοlume οf the pyramid?The vοlume οf a pyramid is given by the fοrmula V = (1/3) Bh, where B is the area οf the base and h is the height.
In this case, the base οf the pyramid is a square with side length s = 8 cm, sο its area is [tex]B = s^2 = 8^2 = 64 cm^2[/tex].
The height οf the pyramid is h = 3 cm.
Therefοre, the vοlume οf the pyramid is:
[tex]V = (1/3) Bh = (1/3) (64 cm^2) (3 cm) = 64 cm^3[/tex]
Hence, the vοlume οf the pyramid is 64 cubic centimetres (cm^3).
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Dividing integers. Question: A football team was penalized 30 points in 3 plays. Suppose the team was penalized an equal number of yards on each play. Write an integer that gives the yards for each penalty.
Answer:
The team was penalized 10 yards on each play.
The model represents the quotient of two decimals.
Please look at pic to understand problem.
Which expression does this model represent?
A. 0.375 divided by 1.5
B. 0.375 divided 4.0
C. 1.5 divided by 0.375
D. 4.0 divided by 0.375
What is the area of the circle? If your doubled the radius, what would the new area be? What is the ratio of the areas from the larger circle to the smaller circle?
The area of the circle is 78.5m² And when the radius is doubled, the area will be 314m².
The ratio of the larger circle to the smaller circle is 4 : 1
What is area of circle?Area is defined as the total space taken up by a flat (2-D) surface or shape of an object. The area is measured in squared units.
The area of a circle is expressed as :
A = πr²
A = 3.14 × 5²
A = 3.14 × 25
A = 78.5m²
When the radius is doubled, i.e
r = 5×2 = 10m
A = πr²
A = 3.14 × 100
A = 314m²
Therefore the area of the new circle is 314m²
The ratio of the area of the larger circle to the area of the smaller circle is ;
314/78.5 = 4/1 = 4 : 1
therefore the ratio of the larger circle to the smaller circle is 4 : 1
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6 cm
10) A water sample shows 0.37 grams of some trace element for every cubic centimeter of water.
Terrence uses a container in the shape of a right cylinder to collect a second sample, filling the
container all the way. The container has a radius of 7.9 centimeters and a height of 11.6 centimeters.
Assuming the sample contains the same proportion of the trace element, approximately how much of
pier[4 points]
the trace element has Terrence collected?oe bris ex
If a water sample shows 0.37 grams of some trace element for every cubic centimeter of water. Terrence has collected 841.51 grams of the trace element.
How to find how much of the trace element has Terrence collected?First, we need to find the volume of the cylinder container:
Volume of cylinder = π(radius)² height)
= π(7.9cm)²(11.6cm)
= 2,274.37 cm³
Amount of trace element = concentration x volume
= 0.37 grams/cm³ x 2,274.37 cm²
= 841. 51 grams
Therefore, Terrence has collected 841.51 grams of the trace element.
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10. Let's simplify = 3³- 3²-3.
Answer:
15.
Step-by-step explanation:
Given: simplify 3³- 3²-3
First, write the equation:
3³- 3²-3
Then using BODMAS, complete the 'power of' numbers:
27 - 9 - 3
Then subtract 27 from 9:
18 - 3
Finally subtract 18 from 3:
= 15
[tex] \: [/tex]
Solution:-[tex] \sf \: 3³ - 3² - 3[/tex][tex] \: [/tex]
[tex] \sf \: 27 - 9 - 3[/tex][tex] \: [/tex]
[tex] \sf \: 18 - 3[/tex][tex] \: [/tex]
[tex] \underline{ \boxed{ \sf{ \color{orange} \: 15 \: }}}[/tex][tex] \: [/tex]
━━━━━━━━━━━━━━━━━━━━━━━━━━
hope it helps! :)
1. Find the average of 16, 50, 14, 20 and 40.
Answer:
28
Step-by-step explanation:
you add up all the numbers and divide by the number of numbers there is
16+50+14+20+40=140
140/5=28
Find the slope of the line shown below?
3/8 or .375
You can find slope by doing rise/run (in fraction form) Rise is counting up or down spaces from one point until you hit the line of the next point. And then the run is counting over to the next point on the line. the number of spaces you counted up or down is the numerator and the run is the denominator.
Find the area of this semi-circle with radius, r = 90cm. Give your answer rounded to 1 DP. rcm The diagram is not drawn to scale. + Mu
Answer:
12723.5(cm^2)
Step-by-step explanation:
the area of the circle
S=Tur^2
The sems-circle is s.=1/2 s =1/2Tur^2
Given the probability histogram pictured for a discrete random variable X, what is μx?
Histogram with x-axis labeled X with scale from 0 to 5, y-axis labeled P(X) with scale from 0 to 0.5 with five bars. Bar 1 height is 0.3, bar 2 height is 0.45, bar 3 height is 0.05, bar 4 height is 0.1, bar 5 height is 0.1.
1.5
1.85
2.1
2.25
2.5
Answer:
2.25
Step-by-step explanation:
what is 2x32+5x20,ωωωωωω,,,,,,,,,,
Answer:
164
Step-by-step explanation:
in the poem hiawatha where did she grow up
Answer: Along the shores of Gitche Gumee
hercules counted some animals at the farm. He saw that 2 of them were sheep and 6 were other animals. If this trend continues, how many of the next 12 animals will be sheep?
Assuming the trend continues, the next 12 animals will include 4 sheep.
What is number?Number is a mathematical concept that represents a quantity or amount. It is usually used to identify a specific value or set of values that can be used for calculation and measurement. Numbers are used in many different fields, including mathematics, science, engineering, and economics. They help us to keep track of quantity and count objects, measure distances and time, and even help to solve problems. Numbers are an essential part of our everyday lives and are essential for understanding the world around us.
This is calculated by taking 2 sheep from the initial group of 8 animals and then multiplying that number by the additional 12 animals for a total of 4 sheep.
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Solve this system of equations for x using the addition method. (Must show steps of addition method to get credit. Do not solve using the substitution method. )
hi
here is the answer
i hope it helps
good luck:))
From the following data realting to a company calculate:
(I) the break even sales ; (ii) sales required to earn a profit of rupees 6000 per period
(I) Break even sales: S = 40,000
(ii) Sales needed to earn a profit Rs 6000 per period: S = Rs. 45,000.
Explain about the Break even sales?The revenue level at which a company makes no profit is known as break even sales. This sales figure completely covers every single one of the variable expenses related to the sales as well as the business's underlying fixed costs.The formula for the Break even sales is:
(S‐v) /S= F + P
s x P/V Ratio = Contribution
First calculate P/V Ratio:
P/V Ratio = Contribution/sales x 100
P/V Ratio = (40‐24)/40 x 100
P/V Ratio= 16/40 x 100
P/V Ratio = 40%
(I) Break even sales
S x P/V Ratio = Fixed Cost
For break even sales, deposition equals fixed cost.
Thus,
Put the values:
S x 40/100 = 16,000
S = 16,000 x 100 / 40
S = 40,000
S = 1000 units
(II) Sales to gain a profit of Rs. 6,000
S x P/V Ratio = F + P
Put the values:
S x 40/100 = 16000 + 2000
S = 18,000 x 100/40
S = Rs. 45,000
S = 1125 units
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Given a mean of 21 and a standard deviation of 1.2, what is the z-score of a data value x = 21?
Therefore, the z-score of a data value x = 21 is 0.
Answer: 0.
Which data do you mean?Data are pieces of information that have undergone modifications to make them transferable or computer-processable. For usage with modern computers and communication networks, data is information that has been converted into binary digital form. The topic of the data is admissible in both its singular and plural variants.
To find the z-score of a data value x, we use the formula:
z = (x - μ) / σ
where:
x is the data value
μ is the mean
σ is the standard deviation
In this case, we are given the mean μ = 21 and the standard deviation σ = 1.2. The data value x is also equal to 21.
Substituting the values into the formula, we get:
z = (21 - 21) / 1.2 = 0 / 1.2 = 0
Therefore, the z-score of a data value x = 21 is 0.
Answer: 0.
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What is the solution of
3+
x <3
O x≤3
O x > 3
O x≥3
X-2
x-3542
Answer:25
Step-by-step explanation: easy
4/5 is greater, less than, or equal to 8/10?
Answer: 4/5 is equal to 8/10
Step-by-step explanation:
Erik spends $680 for cable television service. The cable company offers a deal that promises Erik 3 free months of cable if he signs a contract with them for $40 per month.
Complete the equation below to find the number of months that Erik will have cable television service with this deal. Use m to represent the number of months.
Answer:
Step-by-step explanation:
The cable company offers Erik 3 free months of cable if he signs a contract with them for $40 per month. This means that Erik will pay for (m - 3) months of cable service, since he will get 3 months for free. So the cost of the cable service for (m - 3) months is:
Cost = $40 per month x (m - 3) months
Cost = $40m - $120
We know that Erik spent $680 for the cable television service. So we can set up an equation to relate the cost to the number of months:
$40m - $120 = $680
To solve for m, we can isolate the variable on one side of the equation:
$40m = $800
m = 20
Therefore, Erik will have cable television service for 20 months with this deal.
Determine the domain and range
Step-by-step explanation:
To determine the domain and range of (g f) (x), we first need to find the composition of the functions f(x) and g(x):
(g f) (x) = g(f(x)) = g(2/(x^2-1)) = 2/(x^2-1) + 1
The domain of f(x) is all real numbers except x = -1 and x = 1, since these values would make the denominator equal to zero. Therefore, the domain of (g f) (x) is also all real numbers except x = -1 and x = 1.
To find the range of (g f) (x), we can start by finding the range of f(x). Since the denominator of f(x) is always positive (except at x = -1 and x = 1), the range of f(x) is all real numbers except 0.
When we add 1 to f(x), we shift the range of f(x) up by 1 unit. So, the range of (g f) (x) is all real numbers except 1.
Therefore, the domain of (g f) (x) is all real numbers except x = -1 and x = 1, and the range of (g f) (x) is all real numbers except 1.
Option B
Write the fraction as a sum of fractions three ways 7/10
First three sum 1/10 + 2/10 + 4/10 Proof: When the numbers in the denominator have the same value, fractions can be compute only with the sum of numerator values and the denominator doesn’t change. 1/10 + 2/10 + 4/10 = 1+2+4 / 10 = 7/10 Second three sum 1/10+1/5 + 2/5, Proof: such kind of fractions can be computed as follows: 1/10 + (1+2 )/5 (same denominators). 1/10 + (1+2 )/5= 1/10 + 3/5= 5x1 +10x3 / 5x10 = 5+30 /50 =35/50, by simplifying by 5, 35/50=7/10 The third three sum is 5/10+ 3/15+8/20,it can be computed by using the same method as given above
Hope it helps
Please help asap!!
Thank you
The requried it cannot conclude whether the variable is normally distributed or skewed based on the given data. None of the options are correct.
What is Statistic?The statistic is the study of mathematics that deals with relations between comprehensive data.
It is not possible to determine if the variable "footprint" is normally distributed or skewed based on the given data.
The data represents the measurements of shoe prints for 5 males, but it is not enough to determine the distribution of the variable without additional information such as a larger sample size, the mean and standard deviation of the variable, or a histogram or frequency plot of the data.
Therefore, we cannot conclude whether the variable is normally distributed or skewed based on the given data.
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15. Blaine works for a battery manufacturing company. He wants to develop a method to test the batteries made each day to determine if they work.
Which method would provide the most valid results?
A. sampling the first 25 batteries made each day and testing to see if they work
B. sampling the last 25 batteries made each day and testing to see if they work
C. sampling the first 50 batteries made each day and testing to see if they work
D. randomly sampling 50 batteries throughout the day and testing to see if they work
Correct option is D. randomly sampling 50 batteries throughout the day and testing to see if they work would provide the most valid results.
What is a sample?A sample is described as a smaller, more manageable representation of a larger group. a smaller population with characteristics of a larger one. A sample is used in statistical analysis when the population size is too large to include all participants or observations in the test.
The sample may be biased if it is taken from the first 25 batteries made each day (option A) or the last 25 batteries made each day (option B).
The first and final batteries made each day could not be an accurate representation of the total quality of the batteries produced that day if the battery manufacturing process is not consistent throughout the day.
Although battery quality can change during the day, sampling the first 50 batteries produced each day (option C) may also add bias into the sample.
The ideal course of action is to randomly select 50 batteries throughout the day (option D), since this helps to ensure that the sample is reflective of the general caliber of batteries manufactured that day.
Random sampling reduces the possibility of bias into the sample.
A more accurate image of the quality of the batteries manufactured can be obtained using this method, which is also more likely to capture any variations in battery quality over the day.
Therefore, option D would provide the most valid results.
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15. [-/6.67 Points] DETAILS
AUFINTERALG9 4.4.019.
MY NOTES
A carpenter purchased 50 ft of redwood and 90 ft of pine for a total cost of $292. A second purchase, at the same prices, included 90 ft of redwood and 70 ft of pine for a total cost of
$406. Find the cost per foot of redwood and of pine.
redwood
dollars per foot
pine
dollars per foot
The cost per foot of redwood is $42.37, and the cost per foot of pine is $90.65.
What is an expression?In mathematics, expression is defined as the relationship of numbers, variables, and functions using mathematical signs such as addition, subtraction, multiplication, and division.
Let's use the variables r and p to represent the cost per foot of redwood and pine, respectively.
From the first purchase, we can set up the following system of equations:
50r + 90p = 292 (equation 1)
90r + 70p = 406 (equation 2)
To solve for r and p, we can use the method of substitution. Solving equation 1 for r, we get:
r = (292 - 90p) / 50
Substituting this expression for r into equation 2, we get:
90[(292 - 90p) / 50] + 70p = 406
Multiplying both sides by 50 to clear the fraction, we get:
162 - 27p + 70p = 4060
Combining like terms, we get:
43p = 3898
Dividing both sides by 43, we get:
p = 90.65
So the cost per foot of pine is $90.65.
To find the cost per foot of redwood, we can substitute this value of p into equation 1 and solve for r:
50r + 90(90.65) = 292
50r = 2118.5
r = 42.37
So the cost per foot of redwood is $42.37.
Therefore, the cost per foot of redwood is $42.37, and the cost per foot of pine is $90.65.
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1. Simplify √4x2y4
2. Simplify 4√x8y12
3. Simplify 5√32x5y15
4. Simplify 3√125p^6q³
5. Simplify √25a6b¹⁰c³
6. Simplify 3√64x¹²y5z⁹
7. Simplify √49a^6b³
8. Simplify 4√x^8y^12y^5z^9
9. Simplify 3√-64a³
10. Simplify √9x^2y^10z^13
The simplified forms are;
1) 2x[tex]y^2[/tex]
2) [tex]x^2y^3[/tex]
3) [tex]2xy^3z^5[/tex]
4)[tex]5p^2q[/tex]
5) [tex]5a^3b^5c^3/2[/tex]
6)[tex]4x^4y^5/3z^3[/tex]
7)[tex]7a^3b^3/2[/tex]
8) [tex]x^2y^3z^6[/tex]
9)-4a
10) [tex]3xy^5z^13/2[/tex]
How do you simplify a surd?To simplify a surd, you need to find the largest perfect square factor that divides the number under the square root symbol.
We can see that the surds here can be reduced to the simplest forms when we apply the basics of the rules of exponent which have been used to show the simplified forms as shown here.
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Find the rule. Input: 72,54,120,360,84 Output: 12,9,20,60,14 Rule: Use the rule to find the Output if the Input is 150.
Answer:
If Input is 150, then Output is 25.
Step-by-step explanation:
The rule is to divide 6.
IF: You input 72 & the output is 12:
72/6 = 12
IF: You input 54 & the output is 9:
54/6 = 9
IF: You input 120 & the output is 20:
120/6 = 20
etc.
Therefore, you are dividing 6 each time. The given input is 150. Divide 150 with 6 to find your output:
150/6 = 25
25 would be your output.
~
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8. (02.02 LC)
Which of the following rational numbers is equal to 3.1? (5 points)
22/9
24/9
26/9
28/9
Answer: 28/9 (choice D)
Explanation:
You don't need a calculator for this.
Each fraction involves 9 in the denominator. The numerators are the only thing that change. Let x be the numerator.
x/9 = 3.1 can be estimated to x/9 = 3 and that solves to x = 27
The numerator is around 27.
If x = 26, then 26/9 is slightly smaller than 3If x = 27, then 27/9 is exactly 3If x = 28, then 28/9 is slightly larger than 3Choices A,B,C are ruled out since the numerators are smaller than 28. The only thing left is choice D.
You can use a calculator or long division to confirm that 28/9 = 3.1111... where the '1's go on forever.
A cube has a length of 12 cm , what is its surface area?
72 sq. cm
864 sq. cm
1500 cubic cm
1728 sq cm
HELP!!
Therefore , the solution of the given problem of area comes out to be
option B 864 sq. centimetres is the correct response.
Describe surface regionThe amount of area it takes to cover the outside is a good indicator of its overall size. When calculating a trapezoidal shape surface, the immediate environs are taken into account. The surface area of something determines its overall measurements. The internal water capacity of a cuboid is the sum of the limits for each of its six rectangular edges. Utilize the following technique to determine the box's dimensions: The area is the same in 2lh, 2lw, but also 2hw (SA). The area is represented by the adaptable shape's face.
Here,
The following algorithm determines a cube's surface area:
=> SA = 6s²
where s represents the cube's edge lengths.
=> S =12 cm in this instance.
The result of substituting into the algorithm is:
=> SA = 6 (12)²
=> 6 (144 )²
=> 864 square centimetres.
The cube's surface size is 864 sq. cm as a result.
B) 864 sq. centimetres is the correct response.
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Let h(x) = f(x) + g(x). If f(x)=x^3 and g(x)=4x^4, what is h’(1)
Answer:
h'(1) = 19
Step-by-step explanation:
if h(x) = f(x) + g(x), and f(x) = x³ and g(x) = 4x⁴,
then h(x) = (x³) + (4x⁴)
h(x) = x³ + 4x⁴
h'(x) is the derivative of h(x), which = 3x² + 16x³. Thus, h'(1) = 3(1)² + 16(1)³ = 19
ƒ(x) =x²-2x-8/x+2
k
if x = -2
if x = -2
The given piecewise function is not continuous.
What is a continuous function?Continuous function is a function such that a continuous variation of the argument induces a continuous variation of the value of the function.
Given is the piecewise function as -
f(x) = {(x² - 2x - 8)/(x + 2)} x ≠ -2
f(x) = {k} x = - 2
At {x} = - 2, the function is not defined and we get -
k = {(-2)² - 2(-2) - 8)/(- 2 + 2)} = {(-2)² - 2(-2) - 8)/0} = ∞
So, the function is not continuous.
Therefore, the given piecewise function is not continuous.
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