Compute the prompt neutron lifetime for an infinite critical thermal reactor consisting of a homogeneous mixture of U235 and 1. D20, 2. Be, 3. graphite.

Answer:

25

Step-by-step explanation:

60·\(\frac{1}{3}\)= 20

60·\(\frac{1}{4\\}\)= 15

60- 20+ 15= 60-35 = 25

Answer:

the answer is // x^2 - x +1 (apex)

Step-by-step explanation:

Patrick received a total of approximately $6,785.97 over the course of 52 weeks.

To calculate the total amount of money Patrick received over the 52 weeks, we can use the concept of a geometric sequence. The first term of the sequence is $10, and each subsequent term is 10% more than the previous term.

To find the sum of a geometric sequence, we can use the formula:

Sn = a * (r^n - 1) / (r - 1),

where Sn is the sum of the first n terms, a is the first term, r is the common ratio, and n is the number of terms.

In this case, a = $10, r = 1 + 10% = 1.1 (common ratio), and n = 52 (number of weeks).

Plugging these values into the formula, we can calculate the sum of the sequence:

S52 = 10 * (1.1^52 - 1) / (1.1 - 1)

After evaluating this expression, we find that Patrick received approximately $6,785.97 over the 52 weeks.

As a result, Patrick collected about $6,785.97 in total over the course of 52 weeks.

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Explanation:

The expression -2x means -2 times x. To undo this, we divide all parts of the inequality by -2. Dividing by a negative number will flip the inequality sign. We go from "less than" to "greater than"

-4 < -2x < 10

-4/(-2) > x > 10/(-2) .... inequality signs flip

2 > x > -5

-5 < x < 2

This unknown number x is between -5 and 2. It cannot equal -5. It cannot equal 2.

A sample size of 329 would be required to be 99% confident that the estimated proportion of women-owned businesses not providing employee benefits is within 6 percentage points of the true population proportion.

To calculate the required sample size, we can use the formula:

n = (\(z^2\) * p * q) /\(e^2\)

where n is the sample size, z is the z-score corresponding to the desired level of confidence (in this case, 2.576 for 99% confidence), p is the estimated population proportion (0.165, based on the NWBC's finding), q is 1-p, and e is the maximum error we want to tolerate (in this case, 0.06 or 6 percentage points).

Substituting the values, we get:

n = (2.576^2 * 0.165 * 0.835) / \(0.06^2\)

Solving for n, we get:

n ≈ 329

Therefore, a sample size of 329 would be required to be 99% confident that the estimated proportion of women-owned businesses not providing employee benefits is within 6 percentage points of the true population proportion. Note that this assumes a simple random sample and that the population size is much larger than the sample size, so the finite population correction is not needed.

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Answer:

20h+400>=1200

Step-by-step explanation:

400 is the money Jared already has

20 is what he earns per hour

h is how many hours he works

1200 is the total he needs to buy the car

Answer:

the answer is 20h+400>1200

RNA's capability to self-replicate and catalyze chemical reactions make it the best candidate for the first life-form.

According to the scientists, RNA is considered the best candidate for the first life-form due to the fact that RNA is capable of self-replication and catalysis. This is possible because RNA can act both as a template to produce copies of itself and also as an enzyme to accelerate chemical reactions. These abilities suggest that RNA could have played a role in the emergence of the first living organisms on Earth.

An RNA molecule has the ability to catalyze reactions, which means that it can speed up chemical reactions without itself being altered. Thus, it is capable of serving as an enzyme. Scientists believe that the first life-form must have been capable of self-replication and catalysis, and RNA is capable of both functions.

This capability is significant because it is fundamental for the origin of life. Hence, RNA is believed to have played a significant role in the emergence of the first living organisms on Earth.

To conclude, RNA's capability to self-replicate and catalyze chemical reactions make it the best candidate for the first life-form.

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RNA is considered the best candidate for the first life-form by scientists because RNA is capable of self-replication and catalysis.

The correct option is the first one due to following reasons:

As a result, scientists believe that RNA may have played a crucial role in the origins of life on Earth.

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Scaling a dataset by a constant value changes the standard deviation proportionally by the same constant value.

Scaling (multiplying or dividing) a set of data by a constant value changes the standard deviation of the data.

If you multiply every value in a dataset by a constant value, the standard deviation will also be multiplied by the same constant. For example, if you have a set of data with a standard deviation of 2 and you multiply every value by 3, the new standard deviation will be 6.

On the other hand, if you divide every value in a dataset by a constant value, the standard deviation will also be divided by the same constant. For example, if you have a set of data with a standard deviation of 6 and you divide every value by 3, the new standard deviation will be 2.

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Answer:

9

Step-by-step explanation:

given a quadratic equation in standard form

ax² + bx + c = 0 ( a ≠ 0 ) then the discriminant is

Δ = b² - 4ac

x² + 5x + 4 = 0 ← is in standard form

with a = 1, b = 5 , c = 4 , then

b² - 4ac = 5² - (4 × 1 × 4) = 25 - 16 = 9

Answer:

1:28 |  1:1/28

Step-by-step explanation:

We can show the first two numbers as a ratio:

14:1/2

But we want that second number to be 1 so we can multiply by 1:

28:1 <------ Pages per hour

But now we need the left to be 1, so we divide by 28:

1/28:1

Then flip:

1:1/28

Answer:

hope this helps!

Step-by-step explanation:

You have to divide:

1.9x10^-8 ÷ (4.2x10^-13)

= appr .45 x 10^5

= .45 x 100000

= appr 45,000 times as large

source: https://www.jiskha.com/questions/1857280/estimate-how-many-times-larger-1-9x10-8-is-than-4-2x10-13

credit: mathhelper

Answer:

Try 50% (Yes this is rounded to nearest hundredth)

Answer:75% increase

Step-by-step explanation:

The percentage increase is found by dividing the increase by the starting number, then multiplying that result by 100%.

Percent Change = (Increase ÷ First Value) x 100%

Note: the percent increase measures FROM the first value. An increase from 50 of 25 is a change of 50% (25 is the difference between the two numbers, and 25 is 50% of 50). If that increase were looked at the other way around, it would be a different percentage change (75 decreases by 25 to 50 is a decrease of 33.3%).

Answer:

93

Step-by-step explanation:

the total of all those are 150 so if you multiply it by three you get 450

so multiply pizza by three too

to get 93

Answer:

93 students

Step-by-step explanation:

You first need to add up all the numbers on the chart, 36 + 29 + 54 + 31. You would then get 150. Divide 450 / 150 = 3. You multiply the amount of students chose pizza by 3 and you get 93. 31 * 3 = 93.

Therefore, 93 students would say pizza is there favorite food.

Hope this helps :)

Answer:

i think ..................

Step-by-step explanation:

society idsbwj ja

The distance is 295 feet from the surfers from his eyes.

Geometry is the description of figures in a space with a specific number of dimensions and types. Plane geometry is the most prevalent sort of geometry (dealing with objects like the point, lines, circles, triangles, and polygons),

According to the given question, we have attached a figure which represents the given situation.

Let the distance would be x from the surfers from his eyes

As per the figure, using the sine ratio to find x:

sin 29° = perpendicular/hypotenuse

Substitute the known values and solve for x:

sin 29° = 143/x

0.4848 = 143/x

x = 294.96

x ≈ 295 feet

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Answer:

No solution

Step-by-step explanation:

When we take the 5/2 x to the other side, 4x and 4x cancels out. We get 7=0 which is incorrect. Therefore, x has no solution.

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Answer:

x= \(\frac{7 (+-) \sqrt{113} }{8}\)

Step-by-step explanation:

Answer:

the  number of boys in the competition is 45 boys

Step-by-step explanation:

The computation of the number of boys in the competition is as follows:

Given that

Ratio of boys to girls is 15:16

And, the total participants is 93

So, the number of boys is

= Total participants × boys ratio ÷ total ratio

= 93 × 15 ÷ (15 + 16)

= 93 × 15 ÷ 31

= 45 boys

hence, the  number of boys in the competition is 45 boys

The volume is left in both speaker cabinets is 1215 cubic inches.

A Cube is a three-dimensional solid shape with six square faces, eight vertices, and twelve edges. It is also described as a regular hexahedron.

Some properties of the cube are-

Now, according to the question;

The side of the cube is given as 9 inches.

Then the volume of the cube will become;

Volume = side³

Volume = 9³ = 729.

A Cube is a three-dimensional solid figure with six square sides. If the face takes up 1/6 of this, then 5/6 is left over for cabinet .

Thus,  5/6×729 = 607.5 cubic inches for just a single speaker, multiplied by two to reach the total of 1215 cubic inches.

Therefore, the volume which is left in both speaker cabinets 1215 cubic inches.

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Answer:

$888.21

Step-by-step explanation:

We'll break this problem into two chunks.

First, find the number of dollars Henry gets after working for 37 hours. Since he gets paid $23.56 per hour, all you do is multiply how many hours he's worked (37) by the rate he gets paid (23.56) which gets you $871.72.

Second, adding 42 minutes onto the 37 hours. Since there are 60 minutes in one hour, all you have to do is divide 42 minutes by 60 minutes to get how much of 42 minutes is 1 hour, which is 0.7. Multiply 0.7 by 23.56 (the rate he gets paid per hour) and you have $16.49.

Adding the two sums gets you 888.21 dollars in total.

Answer:

Step-by-step explanation:

Answer:

it is arithmetic sequence ; 3

as the terms are increasing with + 3

Step-by-step explanation:

To find the equation of the line that is perpendicular to the line 3z - y = -5 and passes through the point (7, -2), we need to determine the slope of the given line and then find the negative reciprocal to get the slope of the perpendicular line. Using the point-slope form, we can then find the equation of the perpendicular line.

The given line 3z - y = -5 can be rewritten in slope-intercept form as y = 3z + 5. The slope of this line is 3. The slope of a line perpendicular to it will be the negative reciprocal of 3, which is -1/3.

Using the point-slope form with the point (7, -2), we have:

y - y₁ = m(x - x₁),

where (x₁, y₁) is the given point and m is the slope of the line.

Substituting the values, we get:

y - (-2) = (-1/3)(x - 7),

y + 2 = (-1/3)(x - 7).

To simplify and bring it to standard form, we can multiply both sides by 3:

3y + 6 = -x + 7,

x + 3y = 1.

Therefore, the equation of the line perpendicular to 3z - y = -5 and passing through the point (7, -2) is x + 3y = 1. Thus, option (b) is the correct answer.

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Answer:

8x-14=26

Step-by-step explanation:

To solve this equation you first have to add 14 to both sides to cancel the -14 from the left side. Then you have to divide both sides by 8 to cancel out the 8 in front of the x and to get x alone. Then you have your answer. The answer to 8x-14=26 is x=5.

Answer:

THE LAST TABLE HOPE THIS HELPS:)

The hypotheses for the test are H₀: σ₁² = σ₂² and H₁: σ₁² ≠ σ₂². This is a two-tailed test to assess if there is a difference in the standard deviations of sound levels between the areas designated as "casualty doors" and operating theaters. The claim being investigated is whether or not there is a difference in the standard deviations.

The hypotheses for the test are:

H₀: σ₁² = σ₂² (There is no difference in the standard deviations of the sound levels between the areas designated as "casualty doors" and operating theaters.)

H₁: σ₁² ≠ σ₂² (There is a difference in the standard deviations of the sound levels between the areas designated as "casualty doors" and operating theaters.)

This hypothesis test is a two-tailed test because the alternative hypothesis is not specifying a direction of difference.

To substantiate the claim that there is a difference in the standard deviations, we will conduct a two-sample F-test at a significance level of 0.10, comparing the variances of the two groups.

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Answer:

Step-by-step explanation:

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The vectors u and v such that w = span{u, v} are u = [1, 0, 0] and v = [0, 1, 0], respectively.

To find vectors u and v such that w = span{u, v}, we need to express the vectors in w in terms of linear combinations of u and v.

Let's consider the vectors in w. We can write a generic vector in w as follows:

w = b × u + c × v

where b and c are arbitrary scalars.

Now, let's choose u = [1, 0, 0] and v = [0, 1, 0].

Substituting these values into the equation for w, we have:

w = b × [1, 0, 0] + c × [0, 1, 0]

= [b, 0, 0] + [0, c, 0]

= [b, c, 0]

So, any vector in w can be expressed as a linear combination of u and v. Therefore, w = span{u, v}.

This shows that w is a subspace of \(R^3\) because it can be spanned by a set of two linearly independent vectors (u and v).

A subspace is a vector space that contains the zero vector, is closed under addition and scalar multiplication, and is closed under linear combinations.

In this case, since w can be expressed as a linear combination of u and v, it satisfies the conditions for being a subspace.

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