pls pls help whoever gets it right gets marked brainliest and 15 pts!!

The decimal form of the fraction 5 / 6 is 0.84.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that the fractional number is  5 / 6.

The decimal form of the number will be calculated by dividing the number 5 by the number 6.

Decimal number = 5 / 6

Decimal number = 0.8333333333333

Decimal number = 0.84

Hence, the decimal form will be 0.84 for the fraction 5 / 6.

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Answer:

A & B

Step-by-step explanation:

24 and 12 are both multiples of 4 & 6

This equation cannot be solved as e to the power of any number cannot be negative. The population of a town cannot be negative. Hence, the population cannot reach 60,000.

To approximate the number of years it will take for the population to reach 40 thousand using the graph, you can look at the x-axis and visually estimate the point where the population line intersects with the 40,000 line. It looks like this will occur around year 25.

To find the number of years it will take for the population to reach 60 thousand without using the graph, you can set up the equation p(n) = 18 - e = 60,000 and solve for n.

p(n) = 18 - e = 60,000

18 - e = 60,000 + e

36 = 120,000

e = -84,000

n = log(-84,000)/log(e)

This equation cannot be solved as e to the power of any number cannot be negative. The population of a town cannot be negative. Hence, the population cannot reach 60,000.

Data integration is the process of combining data from multiple sources into a single, coherent view. This can involve the merging of data from multiple databases, files, or other data storage systems into a centralized repository, or it can involve the creation of a new, unified dataset from disparate sources. The goal of data integration is to provide a single version of the truth by removing duplicates, inconsistencies, and errors, and providing a comprehensive, accurate, and up-to-date view of all relevant data. Data integration is a critical step in many data management and analytics processes and is important for ensuring the reliability and usefulness of data for decision-making.

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The equivalent values of the variables {x}, {y} and {z} are -

x = 28.33

y = 29.83

z = 31.83

An function in mathematics defines a relationship between one variable (the independent variable {x})  and another variable (the dependent variable {y}). Example -

y = f{x} = ax + b

Given is that Isaac has a total of ninety pennies, nickels, and quarters. He has three and a half times as many quarters as nickels and one-half as many pennies as nickels.

Assume that he has {x} nickels, {y} pennies and {z} quarters.

So, we can write -

z = x + 3.5

y = x + 1.5

x + y + z = 90

Substituting the values of {y} and {z}, we get -

x + x + 1.5 + x + 3.5 = 90

3x + 5 = 90

3x = 85

x = 28.33                       .... Eq { 1 }

y = 28.33 + 1.5 = 29.83

y = 29.83                               .... Eq { 2 }

z = 31.83                                        .... Eq { 3 }

Therefore, the equivalent values of the variables {x}, {y} and {z} are -

x = 28.33

y = 29.83

z = 31.83

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The solution is X =13.66.

A square root of a number is a value that, when multiplied by itself, gives the number. In mathematics, a square root of a number x is a number y such that y² = x; in other words, a number y whose square is x.

For example, 4 and −4 are square roots of 16, because 4² = ² = 16.

here, we have,

given that,

(X-8)^2-7=25

(X-8)^2= 25+7

(X-8)^2=32

by, thaking sq.root both side we get,

(X-8)= √32

X= 5.66+8

X =13.66

Hence, The solution is X =13.66.

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The solid's volume will be determined by rotating the area enclosed by the specified curve and the lines y = 2x, y = 2, and x = 0 around the x-axis.

V = 8π/3

Volume integration: What is it?

We refer to an integration as a volume integration when it is carried out in three dimensions using the three variables x, y, and z.

In order to establish my integration borders, I set y=2x y=2 to determine their intersection point.

Your aim is to locate the region so you can settle there. The region is going to be circular because we are rotating around the x-axis.

V = (r2)dr = A(x)dx

We subtract the two radiuses from one another since they are different.

∫(πr₂² - πr₁²)dr

∫(π(2)² - π(2x)²)dr

∫(4π - 4πx²)dr

4π∫(1 - x²)dr

Since our boundary is at 1, integrate between 0 and 1.

V = 4π∫(1 - x²)dr = 8π/3

Therefore, V = 8/3 will be the volume of the solid produced by rotating the area enclosed by the specified curve and lines y = 2x, y = 2, and x = 0 about the x-axis.

What Does a Solid's Volume Mean?

The amount of space that a solid occupies is measured by its volume. The amount of unit cubes required to completely fill the solid is used to calculate it.

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To find the number of years it will take for the population of a city to increase from 120000 to 180000, we need to use the formula:

Years = log (target population / starting population) / log (1 + annual growth rate)

Where the annual growth rate is 2.5% or 0.025.

Plugging in the values, we get:

Years = log (180000 / 120000) / log (1 + 0.025)

Years = log (1.5) / log (1.025)

Years = 7.36 years

Rounding to the nearest tenth, we get:

Years = 7.4 years

So it will take approximately 7.4 years for the population of the city to increase from 120000 to 180000 people, assuming a constant annual growth rate of 2.5%.

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Brandon is currently 6 81 years old.

Let M be Michael's age and B be Brandon's age.

We are given that Michael is 3 33 times as old as Brandon. This means that M = 3 33 × B

We are also given that 18 1818 years ago, Michael was 9 99 times as old as Brandon. This means that M - 18 1818 = 9 99 × (B - 18 1818).

We can combine these two equations to solve for Brandon's current age:

3 33 × B = (9 99 × B) + 18 1818

2 66 × B = 18 1818

B = 18 1818 / 2 66 = 6 81.

Therefore, Brandon is currently 6 81 years old.

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When data is collected in a statistical study for only portion or subset of all element of interest we are using a sample.

We frequently collect data from samples, or smaller subsets of the population, as opposed to the entire population as a whole.

A sample is a subset of units chosen to represent all the individuals in the population. Because just a portion of the population was counted, it is only a partial enumeration. To estimate the characteristics for the total population of interest, data from the sampled units is used.

For instance, a medical study looks at how a certain disease spreads among city's stray canines. The population of interest in this case are the city's street dogs. This sample or population of interest corresponds to the overall population on which you want to draw conclusions.

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Terri will need a total cash of $66,240 where $3200 is the down payment and $2240 is the closing cost.

Percentage is defined as the parts of a number per fraction of 100. We have to divide a number with it's whole and then multiply with 100 to calculate the percentage of any number.

Percentage is usually denoted by the symbol '%'.

1. Purchase price = $64,000

Percent of down payment = 5% of purchase price

Amount of money needed to pay down payment = 64,000 × 5%

                                                                                  = 64,000 × 0.05

                                                                                  = $3200

2. Purchase price = $64,000

Percent of closing cost = 3.5% of purchase price

Amount of money needed to pay closing cost = 64,000 × 3.5%

                                                                             = 64,000 × 0.035

                                                                             = $2240

3. Down payment is included in the purchase price.

Closing cost is in addition to the purchase price.

Total cash needed = $64,000 + $2240 = $66,240

Hence the total cash needed to purchase condominium is $66,240.

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The probability of each outcome is equal, and the outcomes have a uniform probability distribution.

The probability of spinning a yellow is 1/4,

The probability of spinning a yellow or green is 1/2.

Probability is a way to gauge how likely something is to happen. According to the probability formula, the likelihood that an event will occur is equal to the proportion of positive outcomes to all outcomes. The probability that an event will occur P(E) is equal to the ratio of favorable outcomes to total outcomes.

Given A spinner with yellow, blue, red, and green sections,

total outcomes = 4

and the possibility for occurring of each color is 1,

probability = favorable outcome/total outcome

P(yellow) = 1/4

P(Red) = 1/4

P(blue) = 1/4

P(green) = 1/4

so the probability of each color is equal,

and a probability distribution known as a "uniform distribution" assumes that all possible outcomes are equally likely to occur.

The probability of spinning a yellow or green,

a favorable outcome for  a yellow or a green = 2

P( yellow or green) = 2/4 = 1/2

Hence the probability of each outcome is equal and the outcomes have a uniform probability distribution.

and P(yellow) = 1/4, and P( yellow or green) = 1/2.

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As per the given data, the required confidence interval is (2.79) or (3.95) and the required sample size is 22.

The table which shows the calculation for mean and sd is attached below the answer ;

Given that :-
The sample mean is  X = ∑x/n = 3.372

Sample standard deviation = √∑(x- X)² /√n-1 = 1.6

and the population standard deviation (σ) = 0.66

(a).

For 95% conifdence interval z-critical value is 1.96. A 95% confidence interval for the mean adhesion is :-

= X ± [tex]Z_{c}[/tex] • σ/√n
= 3.72 ± 1.96 • 0.66/√5

= 3.72 ± 0.5785

= (3.72 + 0.57) or (3.72 - 0.57)  

= (2.79) or (3.95)

Hence, the required confidence interval is (2.79) or (3.95).

(b).

Here we have, E = 0.55/2 = 0.275

so, the required sample size (n) = [tex]Z^{2}_{c}[/tex] • σ²/ E²

       (n) = 1.96² • 0.622²/0.275²

       (n) = 22.13

Hence, the required sample size is 22(approx).

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------------- Correct format of the question is given below ------------

(Q). Ishikawa et al. (Journal of Bioscience and Bioengineering, 2012) studied the adhesion of various biofilms to solid surfaces for possible use in environmental technologies. Adhesion assay is conducted by measuring absorbance at A590. Suppose that for the bacterial strain Acinetobacter, five measurements gave readings of 2.69, 5.76, 2.67, 1.62 and 4.12 dyne-cm2. Assume that the population standard deviation is known to be 0.66 dyne-cm2, and the population distribution is normal.

(a) Find a 95% confidence interval for the mean adhesion.

(b) If the scientists want the confidence interval to be no wider than 0.55 dyne-cm2, how many observations should they take? (Note that, the width of the confidence interval is two times the margin error E, so E = 0.55/2).

Answer:

1/15

Step-by-step explanation:

If you divide all the fractions, only 1/15 has a repeating decimal. Hope you pass, Alyssa

The roots of the given quadratic function would be -

x = {- b - √(b² - 4c)}/2     &      x = {- b + √(b² - 4c)}/2

A function describes a relationship between a dependent and independent variable. Example -

y = f(x) = 5x + 9

A quadratic function is of the form -

y = f(x) = ax² + bx + c

Given is the quadratic equation as -

x² + bx + c = 0

Using the quadratic formula, we can write the roots as -

x = {- b ± √(b² - 4c)}/2

We can write the two distinct roots as -

x = {- b - √(b² - 4c)}/2     &      x = {- b + √(b² - 4c)}/2  

Therefore, the roots of the given quadratic function would be -

x = {- b - √(b² - 4c)}/2     &      x = {- b + √(b² - 4c)}/2.

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Opposite angles are equal in a parallelogram.

Parallelogram is a type of polygon with four sides, four angles and four vertices. It is a type of Quadrilateral.

Given is a parallelogram LMNP which is attached below.

Consider ΔLMP and ΔNMP.

MP = MP, common side.

LM and NP are parallel lines.

∠NPM = ∠LMP, alternate interior angles.

Also ∠LPM = ∠NMP, alternate interior angles.

By the ASA congruence rule, both the triangles ΔLMP and ΔNMP are congruent.

So ∠PLM congruent to ∠MNP.

Similarly, by considering the triangles ΔLNP and ΔLMN, we can prove that angle LMN is congruent to NPL by similar steps.

Hence the opposite angles of a parallelogram are equal.

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Answer:

560

Step-by-step explanation:

7*20*4=560

Answer: 1/9

Step-by-step explanation:

Answer:

3 - 1/3 = 2 2/3

if you take 1/3, then you can just take 1 from 3 for a moment, and then add it back, as shown:

1 - 1/3 = 2/3

Then just add it back:

2/3 + 2 = 2 2/3

Step-by-step explanation:

Hope it helps! =D

The length CD of the rectangle is 34 units

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

The perimeter of the rectangle below is 128 units

This means that

2 * (3x + 3 + 4x - 2) = 128

So, we have

7x + 1 = 64

Evaluate the like terms

7x = 63

This gives

x = 9

Recall that

CD = 4x - 2

So, we have

CD =4 * 9 - 2

CD = 34

Hence, the length is 34 units

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Vertex is (7, -6).

Vertex form is y = -9/121 (x + 7)² + 6

Standard form is y = (-9/121)x² - (126/121)x + 285/121

The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.

The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.

We have,

From the graph,

(4, -3), (10, 3), and (7, -6)

Now,

The vertex form of an equation is y = a(x - h)² + k

From the graph,

The vertex is (-7, 6).

Vertex form.

(-7, 6) = (h, k)

y = a(x - h)² + k

y = a(x + 7)² + 6

Now,

(4, -3) = (x, y)

So,

-3 = a(4 + 7)² + 6

-3 = a x 11² + 6

-3 = 121a + 6

-3 - 6 = 121a

a = -9/121

Now,

y = a(x + 7)² + 6

y = -9/121 (x + 7)² + 6

y = -9/121 (x² + 14x + 49) + 6

y = (-9/121)x² - (9/121 x 14)x - 9/121 x 49 + 6

y = (-9/121)x² - (126/121)x - 441/121 + 6

y = (-9/121)x² - (126/121)x + 285/121

This is the standard form.

Thus,

Vertex form is y = -9/121 (x + 7)² + 6

Standard form is y = (-9/121)x² - (126/121)x + 285/121

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Answer:

Always

Step-by-step explanation:

A whole number will always be an interger.

False. A sample is a subset of all possible data values for a given subject under consideration, not the set of all possible data values.

What is sample space?

The set of all potential outcomes for an experiment is referred to as the sample space S in a random experiment. The results of a random experiment, also known as sample points, are incompatible (i.e., they cannot occur simultaneously).

A sample is a portion of a larger set of data that is selected for analysis or representation. It is not the entire set of all possible data values for a given subject, but rather a smaller subset chosen for the purpose of study.

Sampling is important because it allows researchers to study and make inferences about a larger population with a smaller, more manageable amount of data.

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When the measurement scale provides information regarding greater than or less than, but not how much greater or less, it is in the form of ordinal data.

Ordinal data is a type of categorical data, which is a type of data that fits into discrete categories, such as gender, or levels of education. Ordinal data does not provide numerical values for comparison, only information on the order of the categories.

For example, a survey may ask respondents to rate their opinion of a product on a scale of one to five. The scale provides information on the order of the categories (one being least favorable and five being most favorable), but it does not provide numerical values that can be used to calculate the average opinion of the product.

Mathematically, ordinal data is usually represented using an ordered set of numbers, with each number representing the order of the categories. For example, the survey mentioned above would be represented this way: 1, 2, 3, 4, 5. This set of numbers can then be used to calculate the median, mode, and range of the data. For example, the median value of the example survey would be 3, the mode would be 5, and the range would be 4 (5 - 1 = 4).

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To get the number of half-lives passed, we divide the time of flight from part a by the length of a half-life, as

given in the statement of the problem:

Number of half lives = 2×10−4

1.5×10−6 ≈ 133

The fraction of remaining muons will decrease by 1/2

every half life, so the fraction after a given number N of

half-lives will be:

1/2 × 1/2 × 1/2

· · · N times · · · × 1/2 = ( 1/2)N .

This makes the fraction remaining equal to 1/2 to the power 133:

fraction remaining = ( 1/2)

133 ≈ 10−40. That’s not very many muons

First-generation quarks are what make up pions, which are mesons with no spin. An anti-down quark and an up quark are described in the quark model. In addition to vector, rho, and omega mesons, the exchange of virtual pions also explains why there is still a strong interaction between nucleons. Pions are typically created in high-energy collisions between hadrons and are not created during radioactive decay. In some matter-antimatter annihilation processes, pions are also produced.

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Note that the full question is:

Ne of the many fundamental particles in nature is the muon mu. This particle acts very much like a "heavy electron." It has a mass of 106 MeV/c^2, compared to the electron's mass of just 0.511 MeV/c^2. (We are using E = mc^2 to obtain the mass in units of energy and the speed of light c).Unlike the electron, though, the muon has a finite lifetime, after which it decays into an electron and two very light particles called neutrinos (nu). We'll ignore the neutrinos throughout this problem.

If the muon is at rest, the characteristic time that it takes it to decay is about 2.2 microseconds. Most of the time, though, particles such as muons are not at rest and, if they are moving relativistically, their lifetimes are increased by time dilation. In this problem we will explore some of these relativistic effects.

Cosmic rays are constantly raining down on the earth from outer space. (Figure 1)The majority of these cosmic rays are protons, and when upper atmosphere, they can convert into particles called pions (), which subsequently decay into muons with a characteristic lifetime of T.

Suppose that a cosmic-ray proton crashes into a nitrogen molecule in the upper atmosphere. 45 km above the earth's surface, producing a pia a muon. Assume that the pion has a velocity of 99.99% the speed of light and decays into a muon, which, owing to kinematics, has a downward velocity of 99.9943% the speed of light.

now let’s consider the effect of time dilation how far would the pion actually travel before decaying?

The regression equation used to predict y from x is: y = -2.93x + 95.45. The slope of the regression line is -2.93 and the intercept is 95.45.

Regression analysis is a process used to estimate the relationship between two or more variables. It is used to examine the strength of the relationship between a response variable (y) and one or more predictor variables (x).

The coefficients of the regression equation are estimated by minimizing the sum of squared errors between the predicted and actual values of y. The strength of the relationship is indicated by the coefficient of correlation (r), which is a measure of how closely the data points fit the regression line.

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Sabotage is the most serious threat to aviation safety. Airport security could be increased.

The relative normal probability plot of aeroplane crashes is derived by using its concept:

Error of the pilot: 503/1944 = 0.258.

90/1944 erroneous by humans: 0.046.

326/1944 = 0.167 for weather.

issues with the mechanics: 382/1944 = 0.196.

643/1944 = 0.330 sabotage.

Sabotage provide the chief concern as a result of the higher relative frequency; therefore, airport security could be increased.

Define Relative Frequency.

The number of desired outcomes divided by the total number of outcomes yields a relative frequency.

The total number of accidents in this problem is provided by:

503+90+326+382+643 = 1944

Following are the relative frequencies of each cause:

Error of the pilot: 503/1944 = 0.258.

90/1944 erroneous by humans: 0.046.

326/1944 = 0.167 for weather.

issues with the mechanics: 382/1944 = 0.196.

643/1944 = 0.330 sabotage.

Due to Sabotage provide the greatest concern as a result of the increased relative frequency; therefore, airport security should be increased.

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The length of the Line segment QS is; QS = 63

From the given diagram attached which is a straight line segment, we can see that;

QR = 9x

RS = 12x - 21

We are told that the length of line segment RS = 27. Thus;

12x - 21 = 27

12x = 27 + 21

12x = 48

x = 48/12

x = 4

Thus;

QR = 9*4 = 36

RS = 12(4) - 21

RS = 27

Thus, we can say that;

QS = 36 + 27

QS = 63

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The simplified expression that represents the perimeter of the new triangle

is 72c² + 20c.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

We know the perimeter of any two-dimensional planer figure is the sum of the lengths of it's all the sides except the circle.

The given perimeter of the right angle triangle is,

= (4c + 6c + 4 + 8c + 1).

= 18c + 5.

Therefore, The new perimeter of the triangle will be,

= 4c(18c + 5).

= 72c² + 20c.

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A ratio has two or more numbers that symbolize relation to each other. Ratios are used to compare the numbers, and you can compare them using division.

If the ratio is 2: 3, (children's section: chapter books) we can use this equation to figure out how many chapter books there are if there are 500 children's section books:

In the ratio 2: 3, 2 is being multiplied by 1.5 to get to 3. If the relationship between the numbers 2 and 500 stays proportional, we multiply 500 by 1.5.

Therefore, the ratio of children's books to chapter books is 500: 750, meaning there are 750 chapter books.