20 POINTS!!!!!!

Write 0.000000648 in scientific notation.

648 × 109

6.48 × 107

6.48 × 10−7

648 × 10−9

Frank's Hardware's store has a rectangular logo with a width of 3.4m

and area 13 square meters, we are to obtain the length,

The approximation of the integral ∫cos(x³ - 5) dx using composite Simpson's rule with n = 3 is approximately 1.01259.

The integral ∫cos(x³ - 5) dx using composite Simpson's rule with n = 3, we need to divide the integration interval into smaller subintervals and apply Simpson's rule to each subinterval.

The formula for composite Simpson's rule is

I ≈ (h/3) × [f(x₀) + 4f(x₁) + 2f(x₂) + 4f(x₃) + ... + 2f(\(x_{n-2}\)) + 4f(\(x_{n-1}\)) + f(\(x_{n}\))]

where h is the step size, n is the number of subintervals, and f(\(x_{i}\)) represents the function value at each subinterval.

In this case, n = 3, so we will have 4 equally-sized subintervals.

Let's assume the lower limit of integration is a and the upper limit is b. We can calculate the step size h as (b - a)/n.

Since the limits of integration are not provided, let's assume a = 0 and b = 1 for simplicity.

Using the formula for composite Simpson's rule, the approximation becomes:

I ≈ (h/3) [f(x₀) + 4f(x₁) + 2f(x₂) + 4f(x₃) + f(x₄)]

For n = 3, we have four equally spaced subintervals:

x₀ = 0, x₁ = h, x₂ = 2h, x₃ = 3h, x₄ = 4h

Using these values, the approximation becomes:

I ≈ (h/3) × [f(0) + 4f(h) + 2f(2h) + 4f(3h) + f(4h)]

Substituting the function f(x) = cos(x³ - 5):

I ≈ (h/3)  [cos((0)³ - 5) + 4cos((h)³ - 5) + 2cos((2h)³ - 5) + 4cos((3h)³ - 5) + cos((4h)³ - 5)]

Now, we need to calculate the step size h and substitute it into the above expression to find the approximation. Since we assumed a = 0 and b = 1, the interval width is 1.

h = (b - a)/n = (1 - 0)/3 = 1/3

Substituting h = 1/3 into the expression:

I ≈ (1/3)  [cos((-1)³ - 5) + 4cos((1/3)³ - 5) + 2cos((2/3)³ - 5) + 4cos((1)³ - 5) + cos((4/3)³ - 5)]

Evaluating the expression further:

I ≈ (1/3)  [cos(-6) + 4cos(-4.96296) + 2cos(-4.11111) + 4cos(-4) + cos(-3.7037)]

Approximating the values using a calculator, we get:

I ≈ 1.01259

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The researcher in question has performed a meta-analysis. A meta-analysis is a statistical method used to synthesize the findings from multiple studies that have investigated a similar research question using the same variables and measurement strategies. In this case, the researcher is interested in examining the relationship between exercise and myasthenia gravis.

The process of conducting a meta-analysis involves several steps. First, the researcher identifies and selects relevant studies that meet specific criteria, such as using the same dependent and independent variables (in this case, exercise and myasthenia gravis). In this scenario, 28 studies were identified that meet these requirements.
Next, the researcher extracts the relevant data from each study, such as effect sizes, sample sizes, and other important information. This allows the researcher to compare and combine the results of the individual studies into a single, comprehensive statistical analysis.

In summary, the researcher has conducted a meta-analysis to synthesize the results from 28 studies examining the relationship between exercise and myasthenia gravis, allowing for a more comprehensive understanding of the topic.

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1) y = 6

2) x = 3

3) y = - 2/3

4) x = - 6

So all we have to do is substitute the known 'variable' and solve for the unknown variable.

1)    2(-3) + 3y = 12

                 3y = 12 + 6

                  y = 6

2)    4y = (1/3)x - 5

    4(-1) = (1/3)x - 5

   (1/3)x = 5 - 4

        x = 3

3)       (x/3) - 2 = y

    (4/3) - (6/3) = y

                    y = (-2/3)

4)   2(x+1) = 5y

     2(x+1) = 5(-2)

    2x + 2 = - 10

          2x = -12

           x = -6

A. The missing value for P(X = 1) is 0.20.

B.  The value of P(X ≤ 2) is 0.85.

C.  The value of P(X > 2) is 0.15.

D. The probability of "At least 2" is equivalent to P(X >= 2), which is 0.75.

In probability theory, a probability distribution is a function that assigns probabilities to each possible value of a random variable.

In this Problem, we have a probability distribution for the score on a quiz, with X being the random variable and the table providing the probability of each possible score. In this answer, we will use the given probability distribution to answer the questions posed.

A) Find the missing value for P(X = 1) in the probability distribution.

To find the missing value for P(X = 1), we need to use the fact that the sum of the probabilities for all possible values of X must be equal to 1. Therefore, we can set up an equation:

P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 1

Substituting in the given probabilities, we get:

0.05 + P(X = 1) + 0.60 + 0.15 = 1

Simplifying, we get:

P(X = 1) = 0.20

Therefore, the missing value for P(X = 1) is 0.20.

B) P(X ≤ 2) =

To find P(X ≤ 2), we need to add up the probabilities of X being less than or equal to 2. This is equivalent to:

P(X ≤ 2) = P(X = 0) + P(X = 1) + P(X = 2)

Substituting in the given probabilities, we get:

P(X ≤ 2) = 0.05 + 0.20 + 0.60 = 0.85

Therefore, P(X ≤ 2) is 0.85.

C) P(X > 2) =

To find P(X > 2), we need to add up the probabilities of X being greater than 2. This is equivalent to:

P(X > 2) = P(X = 3)

Substituting in the given probabilities, we get:

P(X > 2) = 0.15

Therefore, P(X > 2) is 0.15.

D) The probability of "At least 2" is equivalent to P(X >= 2)

To find the probability of "At least 2," we need to add up the probabilities of X being greater than or equal to 2. This is equivalent to:

P(X ≥ 2) = P(X = 2) + P(X = 3)

Substituting in the given probabilities, we get:

P(X ≥ 2) = 0.60 + 0.15 = 0.75

Therefore, the probability of "At least 2" is equivalent to P(X ≥ 2), which is 0.75.

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Surveying 200 likely voters from each group of libertarians, independents, Democrats, and Republicans is an example of stratified sampling.

The survey conducted, which involves sampling 200 likely voters from each group of libertarians, independents, Democrats, and Republicans, exemplifies stratified sampling. Stratified sampling is a sampling technique where the population is divided into distinct subgroups or strata based on certain characteristics, and then samples are selected from each subgroup in proportion to their representation in the population.

In this case, the four political groups serve as the strata, and by selecting an equal number of likely voters from each group, the survey aims to ensure that each group is adequately represented in the sample. Stratified sampling allows for more accurate analysis and conclusions by considering the characteristics of each subgroup separately, enhancing the overall validity and reliability of the survey results.

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Answer:

Step-by-step explanation:

V = length * height * width = 18 * length * width

2,592 = 18 * length * width ; divide both sides by 18

144=  length * width ; now what 2 numbers multiplied are giving us 144?

1*144 = 144 ; 2*72 = 144 ; 3*48=144 ; 4*36 =144 ; 6*24 = 144 ; 8*18 = 144 ;

9*16 =144 ; 12*12 =144

5, 7, 10 and 11 does not divide 144 into a whole number

possible lengths and widths are: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144

In the context of a fixed subfield F of the complex numbers C, a straight line CR2 is called F-definable if its equation ax + by + c = 0 holds with coefficients a, b, c ∈ F. .

When considering a fixed subfield F of the complex numbers C, a straight line CR2 is F-definable if it can be represented by an equation of the form ax + by + c = 0, where a, b, and c are elements of F. In other words, all the coefficients of the equation must come from the subfield F. This condition ensures that the line is defined by points that lie within the subfield.

Similarly, a circle in the complex plane R2 is F-definable if its equation satisfies specific criteria. A circle can be expressed as (x - a)2 + (y - b)2 = r2, where a, b, and r are elements of F. This means that the center coordinates (a, b) and the radius r must all belong to the subfield F for the circle to be F-definable.

In summary, when working with a fixed subfield F of the complex numbers C, a straight line in CR2 is F-definable if its equation can be written with coefficients from F, and a circle in R2 is F-definable if its equation meets the conditions of having center coordinates and radius elements in F. These definitions help determine which lines and circles can be expressed using equations with coefficients from the subfield F.

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Answer:

-2 I think +6-8=-2

Using an exponential function, it is found that the inequalities that represents the scenario is:

\(y \geq 1045(1.05)^x\)

\(x \geq 0\)

An increasing exponential function is modeled by:

\(A(t) = A(0)(1 + r)^t\)

In which:

In this problem:

We want a new daily caloric intake of at least y calories, hence:

\(y \geq 1045(1.05)^x\)

The number of days is at least 0, hence:

\(x \geq 0\)

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Answer:

The temperature at the end of the day was -9°C

Step-by-step explanation:

-2 - 7 = -9

Answer:

15x+20

Step-by-step explanation:

you multiply 3x×5 and you get 15 and then you multiply 5×4 and you get 20

Answer:

Step-by-step explanation:

1) 76*.67 = 50.9

   73 * .33 = 24.1

75% = C

2) .3 * 71 + .3*77+ .4*98=

  21.3+23.1+39.2 = 83.6

83.6 = B

3) 73.24  vs.  68.55

hw   88 22 13.2

cp   84 8.4 8.4

test  59 23.6 35.4

fe  77 19.25  11.55

             tats      ester

totals = 73.24    68.55

Answer:h

Step-by-step explanation:

Answer:

13 9/14

Step-by-step explanation:

Add the blue + red fabric

1. Make the denominator the same

6 7/14 + 7 2/14

2. Add

6 7/14 + 7 2/14 = 13 9/14

Answer:

13 9/14

Step-by-step explanation: You would change 1/7 into 2/14 for a common denominator then add 2/14 and 7/14 and get 9/14 and 6+7=13 so it would be 13 9/14. Plzzzz give me brainliest

Answer:

x = 12

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Step-by-step explanation:

Step 1: Define

-2(5x - 5.5) + 8 = -9x + 2 - (-5)

Step 2: Solve for x

The equation that relates the volume of water and the total ingredient volume is the one in option C, it is written as:

t = 4*w

So we know that the volume of water before mixing is 25% of the total ingredient volume.

So if we define the variables:

Then we know that w is equal to the 25% of t.

Then the relation can be written as:

w = (25%/100%)*t

Where we divide the percentage by 100% so we write a decimal number instead of a percentage.

Now we can simply it so we get:

w =  (25%/100%)*t

w = 0.25*t

Now we can isolate t to get:

t = (1/0.25)*w

t = 4*w

So the correct option is C.

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A demand curve shows the quantity demanded of a product at each price.

Your information is incomplete as the table isn't given. Therefore, an overview will be given.

A demand curve simply means a graphical representation of the relationship between price and quantity demanded.

In this case, a demand curve shows the quantity demanded of a product at each price. The profit maximizing price is when the marginal cost equals marginal revenue.

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The profit-maximizing price is when the marginal cost equals marginal revenue.

An individual’s utility-maximizing choices can lead to a demand curve.

Demand can be defined as the total amount of goods or services that consumers are willing and able to purchase at a given price.

In Economics, there are primarily two (2) factors that affect the availability and the price at which goods and services are sold or provided, these are demand and supply.

The marginal decision rule—generally produce downward-sloping demand curves.

This section shows how an individual’s utility-maximizing choices can lead to a demand curve.

Hence, The profit-maximizing price is when the marginal cost equals marginal revenue.

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Step-by-step explanation:

-2=--4(1)+b

I gotchuu

Answer: B: y-axis, because the x-coordinate is the opposite

Step-by-step explanation:

If the x coordinate is negative, it must have been reflected over the y axis.

likewise, if the y coordinate is negative, it must have been reflected over the x axes.

it should make intuitive sense :)

Answer:b

Step-by-step explanation:

Answer:

you would solve it by using the factoring method or the quadratic formula

Answer:

Answer is trinomial

Step-by-step explanation:

degree:3x^2 y2 +3xy2 + 5xy

=the degree of first term = 4

= the degree of second term=3

= the degree of third term = 3

:. the degree = 4

the answer is 4

Answer:

The volume of the triangular prism is 677.6 cubic meters.

Step-by-step explanation:

The formula for the volume of a triangular prism is:

\(\sf\qquad\dashrightarrow Volume \: (V) = \dfrac{1}{2} \times b\times h \times l \)

where:

Substituting the given values, we have:

\(\sf:\implies Volume \: (V) = \dfrac{1}{2} \times 11 \times 11 \times 11.2\)

\(\sf:\implies \boxed{\bold{\:\:Volume \: (V) = 677.6\: meters^3\:\:}}\:\:\:\green{\checkmark}\)

Therefore, the volume of the triangular prism is 677.6 cubic meters.

Greetings! ZenZebra at your service, hope it helps! <33

Answer:

49

Step-by-step explanation:

(4 × 10) + 9

= 49

Answer:5.67* 10^7

Step-by-step explanation:

Answer:

m∡A = 50°

Step-by-step explanation:

since they are complementary they must equal 90°

4x+6 + 4x-4 = 90

8x + 2 = 90

8x = 88

x = 11

∡A = 4(11)+6 = 44+6 = 50

The probability that a woman is having one child of each sex is 0.2548.

The probability of having two children of the same gender (either both girls or both boys) can be calculated by multiplying the probability of having a girl or a boy is (which is 1/2 or 0.5) by itself twice, as each child is independent of the other:

0.5 × 0.5 = 0.25 (probability of having either two girls or two boys)

Since the total probability of having two girls or two boys is 0.5048 as given in the question, the probability of having one child of each sex is: 0.5048 - 0.25 = 0.2548.

Therefore, the probability that a woman with two children has one child of each sex is 0.2548

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a. the probability of drawing 4 red balls out of 8 is given by the binomial distribution 0.08808. b. the probability that all 8 balls will be black is 0.16796. c. the probability that at least 6 of the balls will be black is 0.67127.

(a) The probability that a red ball is drawn is 4/10 and the probability that a black ball is drawn is 6/10. Since the balls are drawn with replacement, the probability of drawing 4 red balls out of 8 is given by the binomial distribution:

P(4 red balls) = (8 choose 4) * (4/10)^4 * (6/10)^4

= 0.08808

So the probability that 4 of the balls will be red is 0.08808.

(b) Since there are only 2 colors, the probability of drawing a black ball is 6/10. So the probability of drawing 8 black balls out of 8 is:

P(8 black balls) = (6/10)^8

= 0.16796

So the probability that all 8 balls will be black is 0.16796.

(c) The probability of drawing at least 6 black balls is the sum of the probabilities of drawing 6, 7, or 8 black balls:

P(at least 6 black balls) = P(6 black balls) + P(7 black balls) + P(8 black balls)

To find each of these probabilities, we can use the binomial distribution:

P(6 black balls) = (8 choose 6) * (6/10)^6 * (4/10)^2

= 0.30199

P(7 black balls) = (8 choose 7) * (6/10)^7 * (4/10)^1

= 0.20132

P(8 black balls) = (8 choose 8) * (6/10)^8 * (4/10)^0

= 0.16796

So:

P(at least 6 black balls) = 0.30199 + 0.20132 + 0.16796

= 0.67127

Therefore, the probability that at least 6 of the balls will be black is 0.67127.

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Answer:

67°.

Step-by-step explanation:

1) m∠PMR=m∠LMN=3x+19°;

2) m∠LMN+m∠LMP=180°, it can be written as 3x+19+9x-31=180;

3) if to solve the equation 3x+19+9x-31=180, then x=16;

4) m∠PMR=3x+19=48+19=67°.

Answer:

3:1

8:5

Step-by-step explanation: