find the surface area of the prism. 9.4, 12mm, 8mm and 5mm​

Answers

Answer 1
To find the surface area of a prism, we need to find the area of each face and add them up.

Let's assume that the 9.4 mm length is the height of the prism and the 12 mm and 8 mm lengths are the base dimensions. The two bases are congruent, so we only need to find the area of one of them.

Area of base = length x width = 12 mm x 8 mm = 96 mm²

Now, let's find the area of each of the four lateral faces. Since the prism is rectangular, the lateral faces are all rectangles with height 9.4 mm. The lengths of the lateral faces are equal to the base dimensions.

Area of lateral face 1 = length x height = 12 mm x 9.4 mm = 112.8 mm²
Area of lateral face 2 = width x height = 8 mm x 9.4 mm = 75.2 mm²
Area of lateral face 3 = length x height = 12 mm x 9.4 mm = 112.8 mm²
Area of lateral face 4 = width x height = 8 mm x 9.4 mm = 75.2 mm²

Now, we can add up the areas of all the faces to get the total surface area of the prism:

Surface area = 2(base area) + 4(lateral face area) = 2(96 mm²) + 4(112.8 mm² + 75.2 mm²) = 2(96 mm²) + 4(188 mm²) = 2(96 mm²) + 752 mm² = 944 mm²

Therefore, the surface area of the given prism is 944 mm².

Related Questions

3x + 3 = 25 − 3x x = Find a two-decimal-place approximation of each solution. (Enter your answers as a comma-separated list. If there is no solution, enter NO.

Answers

The two-decimal-place approximation of the solution to the equation is x ≈ 3.67.

To find the solutions to the equation 3x + 3 = 25 - 3x, we can start by simplifying the equation:

3x + 3x = 25 - 3

6x = 22

x = 22/6

Using a calculator or performing the division, we can find the decimal approximation of x:

x ≈ 3.67

Therefore, the two-decimal-place approximation of the solution to the equation is x ≈ 3.67.

we want to isolate the variable x on one side of the equation. We can do this by combining like terms and performing algebraic operations to simplify the equation.

By adding 3x to both sides of the equation, we eliminate the variable on the right side, and by subtracting 3 from both sides, we isolate the variable on the left side. This leads us to the equation 6x = 22.

To find the value of x, we divide both sides of the equation by 6, which gives us x = 22/6. This is the exact solution of the equation.

However, since the question asks for two-decimal-place approximation, we can use a calculator or perform the division to find x ≈ 3.67.

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you have 8 marbles, 7 of which are the same weight 1 isn't. how do you figure out the lightest marble if you can only weight them twice using scale with two balances.

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Answer:

Firstly we will divide all 8 marbles into 2 sections. Each section contains 4 marbles.

Then we balance each section and find that one section is lighter than other.

Then we take lighter section and further divide it into 2 sections and each section contains 2 marbles.

Then we balance them again and we find the lighter section further divide it into 2 sections and each section contains 1 marble, balance them and we get the lightest marble.

A group of 25 students spent 1,625 minutes studying for an upcoming test. What prediction can you make about the time it will take 130 students to study for the test?

It will take them 3,250 minutes.
It will take them 4,875 minutes.
It will take them 6,435 minutes.
It will take them 8,450 minutes.

Answers

Our prediction is that it will take 130 students a total of 8,450 minutes to study for the test. So, the correct answer is "It will take them 8,450 minutes."

We can use the idea of proportionality to make a prediction about the time it will take 130 students to study for the test. Assuming that the amount of studying required for the test is the same for all students, we can say that the total amount of studying time is directly proportional to the number of students.

Let T be the time required for 130 students to study for the test. Then we can set up a proportion:

25 students / 1,625 minutes = 130 students / T

Solving for T, we get:

T = (130 students x 1,625 minutes) / 25 students = 8,450 minutes

Therefore, our prediction is that it will take 130 students a total of 8,450 minutes to study for the test. So, the correct answer is "It will take them 8,450 minutes."

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i need to know where to graph

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The coordinates when graphed will produce a quadrilateral labeled like int he attached image.

What are coordinates?

A coordinate system in geometry is a system that employs one or more integers, or coordinates, to define the position of points or other geometric components on a manifold such as Euclidean space.

Coordinates are ordered pairs that are used to fix a location on a graph. The coordinates (x, y) are used to plot a point. The x value represents horizontal movement from the origin along the x-axis, while the y value represents vertical movement along the y-axis.

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Please help me 40 points please I've been struggling for so long

Question in photo

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Answer:

[tex]\textsf{Step 1:}\quad m = \dfrac{1}{2}[/tex]

[tex]\textsf{Step 2:}\quad m = \dfrac{1}{2}[/tex]

[tex]\textsf{Step 3:}\quad y-4=\dfrac{1}{2}(x-2)[/tex]

Step-by-step explanation:

Given linear equation:

[tex]y=\dfrac{1}{2}x+4[/tex]

The given equation is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.

[tex]\begin{array}{l}y=\boxed{\dfrac{1}{2}}\;x+\;\boxed{4}\\\;\;\;\;\;\;\;\;\uparrow\;\;\;\;\;\;\;\;\;\;\;\:\uparrow\\\sf \;\;\;\;\;slope\;\;\;\;\;\textsf{$y$-intercept}\end{array}[/tex]

Therefore, the slope of the given line is:

[tex]m = \dfrac{1}{2}[/tex]

We are told that the new line is parallel to the given line.

Since parallel lines have the same slope, the slope of the new line is the same as the slope of the given line:

[tex]m = \dfrac{1}{2}[/tex]

We are told that the new line passes through the point (2, 4).

Therefore, we can plug in the found slope, m = 1/2, and the given point (2, 4), into the point-slope form:

[tex]y-y_1=m(x-x_1)[/tex]

[tex]y-4=\dfrac{1}{2}(x-2)[/tex]

any data that can be represented numerically is called data. select one: a. quantitative b. qualitative

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Any data that can be represented numerically is called data is quantitative.

The correct option is (a)

Quantitative data is data that can be counted or measured in numerical values.

Qualitative data is non-numeric information, such as in-depth interview transcripts, diaries, anthropological field notes, answers to open-ended survey questions, audio-visual recordings and images.

Qualitative data describes qualities or characteristics. It is the descriptive and conceptual findings collected through questionnaires, interviews, or observation.

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what is measure q,r and s

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The measure of angles:

∠S = 72

∠Q = 72

∠R = 180

In the given trapezium

∠P  = 108 degree

We know that for a trapezium,

The sum of the angles of two adjacent sides = 180°.

Therefore,

∠S + 108 = 180

⇒       ∠S = 72 degree

And

∠Q + 108 = 180

⇒        ∠Q = 72 degree

Now.

  ∠S + ∠R = 108

⇒ 72 + ∠R = 180

⇒         ∠R = 108 degree

Hence,

∠S = 72

∠Q = 72

∠R = 180

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Explain why the relation R on 10, 1, 6} given by R = {(0, 0), (1, 1), (6, 6), (0, 1), (1,0), (1, 6), (6, 1)} is not an equivalence relation. Be specific. The relation is not or example, 0 R 1, 1 R6, but 0 R Select reflexive symmetric transitive

Answers

To determine whether a relation is an equivalence relation, we need to check three properties: reflexive, symmetric, and transitive.

Reflexive property: For all a ∈ A, (a, a) ∈ R.

Symmetric property: For all a, b ∈ A, if (a, b) ∈ R, then (b, a) ∈ R.

Transitive property: For all a, b, c ∈ A, if (a, b) ∈ R and (b, c) ∈ R, then (a, c) ∈ R.

Let's check each property for the given relation R on {0, 1, 6}.

Reflexive property: (0, 0), (1, 1), and (6, 6) are in R, so the reflexive property holds for these elements. However, (1, 1) is the only element in R that satisfies this property. (0, 0) and (6, 6) are not enough to establish the reflexive property for the relation R.

Symmetric property: (0, 1) and (1, 0) are in R, but (1, 0) is not in R. Therefore, the symmetric property does not hold for the relation R.

Transitive property: (0, 1) and (1, 6) are in R, but (0, 6) is not in R. Therefore, the transitive property does not hold for the relation R.

Since the relation R does not satisfy all three properties, it is not an equivalence relation.

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Determine if each statement is sometimes, always, or never true.
Two lines that intersect in one point are .......... coplanar.
Two lines that never intersect are ........... coplanar.

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Two lines that intersect in one point are always coplanar, and two lines that never intersect are sometimes coplanar

Checking if the statement is sometimes, always, or never true.

From the question, we have the following parameters that can be used in our computation:

The statements

Explaining each statement, we have

Statement 1

Two lines that intersect in one point are always coplanar,

This is becase they both lie in the same plane that contains the intersection point.

Satement 2

Two lines that never intersect are sometimes coplanar

This is because, two skew lines are not coplanar, but two parallel lines are coplanar.

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(q35) Evaluate the integral

Answers

Answer:

  B.  -1/2e^(-2x) +C

Step-by-step explanation:

You want the indefinite integral of ln(e^(e^(-2x))).

Simplify

The integrand can be simplified using ln(e^x) = x:

  ln(e^(e^(-2x))) = e^(-2x)

Integrate

The antiderivative of e^a is (1/a)e^a, so the integral of interest is ...

  [tex]\displaystyle \int{e^{-2x}}\,dx=\dfrac{1}{-2}e^{-2x}+C=\boxed{-\dfrac{1}{2}e^{-2x}+C}[/tex]

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if the demand for oranges is written as q = 100 - 5p, then the inverse demand function is q = 20 - 0.2p. q = 5p - 100. p = 20 - 0.2q. p = 20 - 5q.

Answers

The correct inverse demand function for the given demand function, q = 100 - 5p, is q = 20 - 0.2p.

To understand why q = 20 - 0.2p is the correct inverse demand function, it is necessary to solve for p in terms of q. To do this, we can rearrange the original demand equation as follows:

q = 100 - 5p

5p = 100 - q

p = (100 - q)/5

This equation shows that the price of oranges (p) is a function of the quantity demanded (q). To derive the inverse demand function, we simply need to swap the variables q and p:

q = 20 - 0.2p

This equation shows that the quantity demanded (q) is a function of the price (p) and gives us a downward sloping demand curve. The other three equations provided are incorrect because they do not represent the relationship between price and quantity demanded correctly. In summary, the correct inverse demand function for the given demand function, q = 100 - 5p, is q = 20 - 0.2p.

This equation shows that the quantity demanded (q) is a function of the price (p) and that as the price of oranges increases, the quantity demanded decreases. In other words, the demand curve for oranges is downward sloping, which is a common characteristic of most goods in a market economy. It is important to note that the other three equations provided are incorrect and do not represent the inverse demand function for this scenario.

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you have a data set that has many extreme low and high values. you should expect that your kurtosis value is:

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The kurtosis value of the data set with many extreme low and high values is expected to be high. Outliers can significantly affect the kurtosis value of a distribution, resulting in a higher kurtosis value.

Kurtosis is a statistical measure that indicates the degree of heaviness or lightness in the tails of a probability distribution compared to the normal distribution. A high kurtosis value indicates that the distribution has more extreme values in its tails than a normal distribution.

When a data set has many extreme low and high values, it means that the data set has a lot of outliers or extreme values. Outliers can significantly affect the kurtosis value of a distribution, resulting in a higher kurtosis value.

In summary, a data set with many extreme low and high values is expected to have a higher kurtosis value than a data set with fewer outliers.

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How many ounces of gatorade would Marcus drink if he walked 12 miles

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If Marcus has a 28-ounce bottle of Gatorade and he drinks 21 ounces then 25%  of the bottle Marcus has left.

Given that Marcus has a 28-ounce bottle of Gatorade.

He drinks 21 ounces.

Knowing he drank 21 oz. out of a 28 ox. bottle, he has 7 oz. left.

We want to know the answer to: 7 is what percent of 28?

To do this, we simply take 7 and divide it by 28. 7/28 is 1/4, which can be represented by 0.25

0.25 as a percent is 25%.

Hence, if Marcus has a 28-ounce bottle of Gatorade and he drinks 21 ounces then 25%  of the bottle Marcus has left.

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Which distribution is a plausible representation of the sampling distribution for random samples of 30 students?

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The sampling distribution for random samples of 30 students is most likely to follow a normal distribution.

This is based on the central limit theorem, which states that as sample size increases, the sampling distribution of the mean tends to approach a normal distribution, regardless of the shape of the population distribution.

The normal distribution is characterized by a symmetrical bell-shaped curve and is commonly used in statistical analysis to model a wide range of natural phenomena, including measurement errors, human traits, and physical properties. It is also widely used in inferential statistics to estimate population parameters, such as means and variances, from sample statistics.

Therefore, in the absence of information about the population distribution, a normal distribution is a reasonable assumption for the sampling distribution of random samples of 30 students.

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The sampling distribution for random samples of 30 students is most likely to follow a normal distribution.

This is based on the central limit theorem, which states that as sample size increases, the sampling distribution of the mean tends to approach a normal distribution, regardless of the shape of the population distribution.

The normal distribution is characterized by a symmetrical bell-shaped curve and is commonly used in statistical analysis to model a wide range of natural phenomena, including measurement errors, human traits, and physical properties. It is also widely used in inferential statistics to estimate population parameters, such as means and variances, from sample statistics.

Therefore, in the absence of information about the population distribution, a normal distribution is a reasonable assumption for the sampling distribution of random samples of 30 students.

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When the Laplace transform is applied to the problem y" + 2y' + y = e^3t, y(0) = 1, y'(0) = 2, the resulting transformed equation is Select the correct answer. SHOW WORK AS TO How YOU ARRIVE AT THE RESULT. a. (s^2 + 2s + 1)Y = -s - 4 + 1/(s - 3) b. (s^2 + 2s + 1)Y = s - 4 + 1/(s - 3) c. (s^2 + 2s + 1)Y = s + 4 + 1/(s + 3) d. (s^2 + 2s + 1)Y = -s - 4 + 1/(s + 3) e. (s^2 + 2s + 1)Y = s + 4 + 1/(s - 3)

Answers

As per the Laplace transform, the solution of the equation is (s² + 2s + 1)Y(s) = -s - 4 + 1/(s - 3).  (option a).

The given differential equation y'' + 2y' + y = ([tex]e^{(3t)}[/tex]) represents a harmonic oscillator with a forcing term ([tex]e^{(3t)}[/tex]). To solve this equation using the Laplace transform, we apply the transform to both sides of the equation and use the linearity property of the transform to obtain:

L(y'') + 2L(y') + L(y) = L([tex]e^{(3t)}[/tex])

Using the derivative property of the Laplace transform, L(y'') = s²Y(s) - s*y(0) - y'(0) and L(y') = sY(s) - y(0), where Y(s) is the Laplace transform of y(t). Substituting these expressions into the above equation and simplifying, we get:

(s² + 2s + 1)Y(s) = s - 4 + 1/(s - 3)

where we have used the initial conditions y(0) = 1 and y'(0) = 2 to obtain the constants s*y(0) and y(0) in the Laplace transforms of y'' and y', respectively.

Therefore, the correct answer is (a) (s² + 2s + 1)Y(s) = -s - 4 + 1/(s - 3).

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which ion has the greater ratio of charge to volume? na or cs which ion has the smaller ? na or cs type in the symbol of the atom so either na or cs

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Cs has the greater ratio of charge to volume compared to Na. Na has the smaller ratio of charge to volume compared to Cs.

This is because Cs (cesium) has a larger atomic radius than Na (sodium), which means that its valence electron is farther away from the nucleus and more shielded by inner electrons. This results in a lower effective nuclear charge and a weaker attraction to the outermost electron. However, Cs also has a larger positive charge than Na, as it has one more proton in its nucleus. Therefore, Cs has a larger ratio of charge to volume than Na. The ratio of charge to volume is an important factor in determining the chemical and physical properties of elements and ions.

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true or false: given the scatter plot, there is evidence to suggest the model suffers from heteroskedasticity.

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True. Based on the given scatter plot, there is evidence to suggest the model suffers from heteroskedasticity. Heteroskedasticity refers to the presence of unequal variances across different levels of a predictor variable in a regression model.

Based on the scatter plot alone, it is difficult to determine whether or not there is evidence to suggest that the model suffers from heteroskedasticity. Heteroskedasticity refers to the presence of unequal variances in the error term across different levels of the independent variable(s). To test for heteroskedasticity, one would typically examine the residuals of the regression model and look for patterns in the variance of these residuals as a function of the independent variable(s). Therefore, without analyzing the residuals, it is not possible to definitively say whether or not there is evidence of heteroskedasticity.

Heteroskedasticity refers to the presence of unequal variances across different levels of a predictor variable in a regression model. In a scatter plot, this is typically indicated by a pattern in which the spread of the data points increases or decreases along the predictor variable's range.

The presence of heteroskedasticity can have negative consequences for the reliability and efficiency of regression estimates. It can lead to biased standard errors, which can then affect hypothesis testing and confidence intervals. Consequently, it is crucial to identify and address heteroskedasticity when analyzing regression models.

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1) If ∑Cn(x–3)^n converges at x=7 and diverges at x=10, what can you say about the convergence at x=11? At x=5? At x=0?

Answers

At x=0, we can say that the series ∑[tex]Cn(X - 3)^n[/tex] converges, as the given condition for convergence is satisfied at x=7, x=10, and x=0 is between the two values.  

At x=11, we can say that the series ∑[tex]Cn(X - 3)^n[/tex] converges, as the given condition for convergence is satisfied at x=7 and x=11 is between the two values. At x=5, we can say that the series ∑[tex]Cn(X - 3)^n[/tex] diverges, as the given condition for convergence is not satisfied at x=5.

The theory behind the question is the idea of a power series, which is an infinite series of terms where each term is a power of a variable raised to a constant. In this case, we have a series of the form:

[tex]Cn(X - 3)^n[/tex]

here Cn is a constant. The question is asking about the behavior of this series as a function of the variable x, specifically whether it converges or diverges. The condition for convergence of a power series is that the absolute value of the coefficients (i.e., the absolute value of Cn) must be less than or equal to 1 for all values of x in the interval where the series is defined. If this condition is satisfied, then the series converges.

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#17 Find the value of x.
IX
68°

Answers

The measure of angle x of the right angled triangle is x = 22°

Given data ,

Let the Triangle be ΔABC , such that

∠A + ∠B + ∠C = 180°

Now , the angle ∠ABC = 90° ( given )

So , the measure of ∠68° + x° = 90°

Subtracting 68° on both sides , we get

x = 90 - 68

x = 22°

Hence , the angle is x = 22°

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find the standard form of the equation of the parabola with the given characteristic(s) and vertex at the origin. vertical axis and passes through the point (5, 9)

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The standard form of the equation of the parabola is y = (9/25)x^2. To find the standard form of the equation of the parabola with a vertex at the origin and a vertical axis that passes through the point (5,9), we need to use the standard form of the equation of a parabola, which is y = a(x-h)^2 + k, where (h,k) is the vertex.

Since the vertex is at the origin, we have h=0 and k=0, which simplifies the equation to y = ax^2. Now, we just need to find the value of "a" by plugging in the point (5,9).  9 = a(5)^2. Solving for a, we get a = 9/25.

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Which equation is equivalent to 3/5 = 17 2/5 ÷ h? A.3 = (87 ÷ h) – 9 B.3 × 9 = (87 ÷ h) ÷ 9 3 + 9 = (87 ÷ h) + 9 C.3 – 9 = (87 ÷ h)

Answers

The value of equivalent expression is,

3 = 87 ÷ h

We have to given that;

Equation is,

⇒ 3/5 = 17 2/5 ÷ h

Now, We can simplify as;

⇒ 3/5 = 17 2/5 ÷ h

⇒ 3/5 = 87/5 ÷ h

⇒ h = 87/5 × 5/3

⇒ h = 29

For Option A;

3 = 87 ÷ h

h = 87 / 3

h = 29

For B;

3 × 9 = (87 ÷ h) ÷ 9

27 × 9 = 87 ÷ h

h = 87 / 27 x 9

h = 0.35

C) 3 - 9 = 87 ÷ h

h = 87 / - 3

h = - 29

Thus, The value of equivalent expression is,

3 = 87 ÷ h

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Solve by completing square 4x^2+12x=0

Answers

Answer:

x=0,-3

Step-by-step explanation:

Answer:

Step-by-step explanation: The answer is -3.

Given equation is, 4x^2 + 12x = 0

Dividing the equation by 4, we will get,

x^2 + 3x = 0

x^2 = -3x

Dividing the equation by x, we will get,

x = -3

find the point at which the line intersects the given plane. x = 3 − t, y = 2 t, z = 2t; x − y 5z = 9 (x, y, z) = incorrect: your answer is incorrect.

Answers

To find the point at which the line intersects the given plane, we will first substitute the parametric equations of the line into the equation of the plane and then solve for the parameter 't'.

The parametric equations of the line are:

x = 3 - t
y = 2t
z = 2t

The equation of the plane is:

x - y + 5z = 9

Step 1: Substitute the parametric equations of the line into the plane equation:

(3 - t) - (2t) + 5(2t) = 9

Step 2: Simplify the equation and solve for 't':

3 - t - 2t + 10t = 9
7t - t = 6
6t = 6
t = 1

Step 3: Substitute the value of 't' back into the parametric equations of the line to find the intersection point (x, y, z):

x = 3 - t = 3 - 1 = 2
y = 2t = 2(1) = 2
z = 2t = 2(1) = 2

Therefore, the point at which the line intersects the given plane is (2, 2, 2).

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The mass of Mercury is about 3.3 × 10^23 kilograms. The mass of Venus is about 4.87 × 10^24 kilograms. How much greater is the mass of Venus than the mass of Mercury, in kilograms? Express you answer in scientific notation.

Answers

The value that gives how much greater is the mass of Venus than the mass of Mercury is given as follows:

[tex]1.48 \times 10^1[/tex]

What is scientific notation?

A number in scientific notation is given by the notation presented as follows:

[tex]a \times 10^b[/tex]

With the base being [tex]a \in [1, 10)[/tex], meaning that it can assume values from 1 to 10, with an open interval at 10 meaning that for 10 the number is written as 10 = 1 x 10¹, meaning that the base is 1, justifying the open interval at 10.

The masses are given as follows:

Mercury: [tex]3.3 \times 10^{23}[/tex]Venus: [tex]4.87 \times 10^{24}[/tex]

To obtain how many times greater the mass of Venus is, we divide the masses, hence:

[tex]\frac{4.87 \times 10^{24}}{3.3 \times 10^{23}} = 1.48 \times 10^1[/tex]

Because:

The division of the bases is of 4.87/3.3 = 1.48.The subtraction of the exponents is of 24 - 23 = 1.

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Find the Taylor polynomialT3(x)for the function f centered at the number a.f(x) = 5 tan^(-1)x, a = 1

Answers

The Taylor polynomial T3(x) for the function f(x) = 5tan^(-1)x centered at a = 1 is T3(x) = 5[(x-1) - (x-1)^3/3 + (x-1)^5/5].

To find the Taylor polynomial T3(x), we first need to find the derivatives of f(x) at x = 1. The derivatives of f(x) are f'(x) = 5/(1+x^2), f''(x) = -10x/(1+x^2)^2, f'''(x) = 30(1-x^2)/(1+x^2)^3. We evaluate these derivatives at x = 1 to get f(1) = 5tan^(-1)1 = 5π/4, f'(1) = 5/2, f''(1) = -25/8, and f'''(1) = 75/16.  Next, we use the Taylor series formula to write the Taylor polynomial T3(x) as T3(x) = f(a) + f'(a)(x-a) + f''(a)(x-a)^2/2! + f'''(a)(x-a)^3/3!, where a = 1. We substitute the values we found above to get T3(x) = 5π/4 + 5/2(x-1) - 25/16(x-1)^2 + 75/48(x-1)^3. Simplifying the polynomial gives T3(x) = 5[(x-1) - (x-1)^3/3 + (x-1)^5/5].

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a sample proportion of 0.18 is found. to determine the margin of error for this statistic, a simulation of 100 trials is run, each with a sample size of 50 and a point estimate of 0.18. the minimum sample proportion from the simulation is 0.28, and the maximum sample proportion from the simulation is 0.40. what is the margin of error of the population proportion using an estimate of the standard deviation?

Answers

The margin of error of the given population proportion by applying an estimate of the standard deviation based on the simulation is equal to 0.06.

Sample proportion = 0.18

Number of trials = 100

Sample size = 50

To determine the margin of error for the population proportion using an estimate of the standard deviation,

we can use the range of the sample proportions from the simulation.

The margin of error is calculated as half of the range.

In this case, the minimum sample proportion is 0.28 and the maximum sample proportion is 0.40.

Range = Maximum sample proportion - Minimum sample proportion

Range = 0.40 - 0.28

           = 0.12

The margin of error is half of the range,

Margin of Error = Range / 2

Margin of Error = 0.12 / 2

                          = 0.06

Therefore, the margin of error of the population proportion, using an estimate of the standard deviation based on the simulation, is 0.06.

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An automated machine is calibrated to fill bags of pretzels so that each bag weighs 8 ounces. A worker at the factory believes the machine is not filling the bags to the correct weight. She randomly selects 40 bags of pretzels and, after weighing them, calculates their mean weight to be 8.4 ounces. Write null and alternative hypothesis to describe this situation.

Answers

The null hypothesis (H0) is that the machine is filling the bags of pretzels to the correct weight, that is, the mean weight of the bags is 8 ounces:


H0: μ = 8


The alternative hypothesis (Ha) is that the machine is not filling the bags to the correct weight, that is, the mean weight of the bags is different from 8 ounces:


Ha: μ ≠ 8

In this case, the worker's observation of a mean weight of 8.4 ounces in a sample of 40 bags suggests that the bags may be overfilled. To test this hypothesis, the worker would need to conduct a hypothesis test using appropriate statistical methods and a significance level to determine whether the observed difference is statistically significant or not.

Solve x2 − 16 =0 (1 point)
1: square root 2
2: times square root 2
3: ±2
4: ±4

Answers

Answer:

option 4

Step-by-step explanation:

x² - 16 = 0 ( add 16 to both sides )

x² = 16 ( take square root of both sides )

[tex]\sqrt{x^2}[/tex] = ± [tex]\sqrt{16}[/tex]

x = ± 4

the quality control manager at a computer manufacturing company believes that the mean life of a computer is 105 months, with a variance of 81 . if he is correct, what is the probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months? round your answer to four decimal places.

Answers

The probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months is 0.1217.

In this problem, we have to find the probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months, given that the quality control manager believes that the mean life of a computer is 105 months, with a variance of 81.

To solve this problem, we can use the Central Limit Theorem, which states that the sample mean of a sufficiently large sample size, drawn from any population, will be approximately normally distributed with mean μ and variance σ²/n, where μ is the population mean, σ² is the population variance, and n is the sample size.

In this case, we know that the population mean is μ = 105 months and the population variance is σ² = 81. Since we are interested in the mean of a sample of 70 computers, we can use the formula for the standard error of the mean, which is σ/√n, to calculate the standard deviation of the sampling distribution of the mean.

The standard deviation of the sampling distribution of the mean is given by σ/√n = √(81/70) ≈ 1.226.

Now, we want to find the probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months. We can standardize this difference using the formula

z = (x' - μ)/(σ/√n), where x' is the sample mean.

Substituting the values, we get z = (x' - 105)/(1.226), and we want to find the probability that |z| < 1.9/1.226 ≈ 1.550.

Using a standard normal distribution table, we can find that the probability of |z| < 1.550 is approximately 0.1217.

Therefore, the probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months is 0.1217.

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HELP ME PLEASE
A random sample of 50 purchases from a particular pharmacy was taken. The type of item purchased was recorded, and a table of the data was created.


Item Purchased Health & Medicine Beauty Household Grocery
Number of Purchases 10 18 15 7


Which graphical representation would be best to display the data?
Box plot
Line plot
Histogram
Stem-and-leaf plot

Answers

A bar graph would be the best graphical representation to display the data. It is suitable for displaying categorical data and allows for easy comparison between different categories.

In this case, the categories are the different types of items purchased (Health & Medicine, Beauty, Household, Grocery), and the number of purchases in each category is represented by the height of the bars.

A histogram would be the best graphical representation to display the data of a random sample of 50 purchases from a particular pharmacy, where the type of item purchased was recorded, and a table of the data was created.

The data includes the number of purchases for each item category: health & medicine, beauty, household, and grocery.

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