Witch atom has 12 protons

A carbon (C)
B nitrogen (N)
C sodium (Na)
D magnesium (Mg)

Also I didn’t mean to click a answer on there

Answer:

\(5x + 2 = 100 \\ 5x = 100 - 2 \\ 5x = 98 \\ x = \frac{98}{5} \\ x = 19.6\)

Answer: the answer would be x because that's the actual variable in the question then if 19.6 was not an option

Step-by-step explanation:

Using proportions, it is found that 44 consecutive customers must round up the bills so that the percentage of people who donated increases to 50%, so option A is correct.

A proportion is the number of desired outcomes divided by the number of total outcomes.

Considering that 38 out of 120 customers rounded their bill up, with x customers added, the proportion will be of 38 + x out of 120 + x.

The desired proportion is 0.5, hence:

\(\frac{38 + x}{120 + x} = 0.5\)

\(38 + x = 60 + 0.5x\)

\(0.5x = 22\)

\(x = \frac{22}{0.5}\)

\(x = 44\)

44 customers, so option A.

A similar problem is given at https://brainly.com/question/20571459

This expression \(r_{i-j}\) describes the distance between two points i and j in a geometric object

In the context of symmetry and rotations, \(r_{i-j}\) typically refers to the distance between two points i and j in a geometric object, such as a crystal lattice or a molecule.

It is a vector that points from point i to point j, and its magnitude is the distance between the two points.

The distance vector \(r_{i-j}\) is also used to describe the position of a point in the crystal lattice relative to the rotation axis.

Read more about symmetries and rotations at

brainly.com/question/2762589

#SPJ1

Answer:

B) Jet ski rental costs $20 initially plus $15 for each hour.

Step-by-step explanation:

The equation of a line has the following format:

\(y = mx+b\)

In which m is the slope, which having two points on the line, is given by the change in y divided by the change in x, and b is the y-intercept, which is the value of y when \(x = 0\).

Passes through point Y (0, 20):

This means that \(b = 20\). So

\(y = mx+20\)

Slope:

Through points (0,20) and (4,80). So

Change in y: 80 - 20 = 60

Change in x: 4 - 0 = 4

Slope: 60/4 = 15

So

\(y = 15x+20\)

Situation:

We want a situation in which we have a fixed fee of 20, and then for each unit of time or of the product, and increase of 15. So the correct option is B

A, percentages

You would see percentages on a circle graph, because it's how many parts of the whole that they take up.

Happy to help, have a great day! :)

Answer:

b) Then z(s) is in the rejection region for H₀. We reject H₀. The p-value is smaller than α/2

c)CI 95 %  =  ( 0.00002 ;  0.09998)

Step-by-step explanation: In both cases, the size of the samples are big enough to make use of the approximation of normality of the difference of the proportions.

Recent Sample

Sample size    n₁  =  1000

Number of events of people with financial fitness more than fair

x₁  =  410

p₁ =  410/ 1000  =  0.4     then q₁ = 1 - p₁    q₁ =  1 -  0.4    q₁  = 0.6

Sample a year ago

Sample size    n₂ =  1200

Number of events of people with financial fitness more than fair

x₂  =  420

p₂  =  420/1200     p₂ = 0.35   q₂  =  1 - p₂    q₂  = 1 - 0.35   q₂ = 0.65

Test Hypothesis

Null Hypothesis                                  H₀              p₁  =  p₂

Alternative Hypothesis                      Hₐ              p₁  ≠  p₂

CI  95 % then significance level  α  =  5%   α  = 0.05    α/2  = 0.025

To calculate p-value:

SE  =  √ (p₁*q₁)/n₁  +  (p₂*q₂)/n₂

SE  =  √ 0.4*0.6/1000 +  0.65*0.35/1200

SE  =  √ 0.00024 + 0.000189

SE = 0.021

z(s) =  ( p₁ - p₂ ) / SE

z(s) = ( 0.4 - 0.35 )/0.021

z(s) = 0.05/ 0.021

z(s) =  2.38

We find p-value from z-table to be   p-value = 0.00842

Comparing

p-value with  α/2   = 0.025

α/2 >  p-value  

Then z(s) is in the rejection region for H₀. We reject H₀

CI 95 %  =  ( p₁  -  p₂ )  ±  2.38*SE

CI 95 %  =  ( 0.05 ± 2.38*0.021 )

CI 95 %  =  ( 0.05 ± 0.04998)

CI 95 %  =  ( 0.00002 ;  0.09998)

CI 95 % does not contain the 0 value affirming what the hypothesis Test already demonstrate

Answer:

yes I agree with you

Step-by-step explanation:

thanks for the free question

Answer: mmmmmm Otae?

Step-by-step explanation:

Answer:

55%

Step-by-step explanation:

55% of the cupcakes were mocha flavored.

The statement is true , that the given sample follows binomial distribution.

If a random variable has two alternative outcomes (success or failure), it has a binomial distribution.

Each draw must be separate from the ones that came before it.

There is a set number of drawn components.

We randomly select 15 students, and since the sample size of 15 is less than 10% of the total population, we can assume that each draw is independent.

Because X has a binomial distribution, success is determined by whether the student is left-handed (failure is determined by whether the student is not left-handed).

The binomial distribution is the discrete probability distribution used in probability theory and statistics that only allows for success or failure as the possible outcomes of an experiment.

To learn more about binomial distribution

brainly.com/question/28108922

#SPJ4

For the given graph of quadratic function whose vertex is (4,2) , the domain  and the range in the interval notation is given by :

Domain = ( -∞ , ∞ )

Range = ( 2 , ∞ )

As given in the question,

For the given graph of quadratic function ,

Given graph represents the parabola.

Standard equation of the parabola with vertex ( h, k) is given by,

y = a ( x - h )² + k

Substitute the value ( h ,k ) = ( 4, 2 )

y = a ( x - 4 )² + 2

As it is a parabola in the first quadrant and faces in the upward direction,

Value of x tends to -∞ to ∞

Domain = ( -∞ , ∞ )

Minimum value of y coordinate is 2 and increases to ∞.

Range = ( 2, ∞ )

Therefore, for the given graph of quadratic function whose vertex is (4,2) , the domain  and the range in the interval notation is given by :

Domain = ( -∞ , ∞ )

Range = ( 2 , ∞ )

Learn more about graph here

brainly.com/question/17267403

#SPJ1

The correct statement which is true about all perfect cubes is,

⇒ A perfect cube represents 3 times the area of a face of the cube.

We have to given that;

The model shown below is a perfect cube with a volume of 27 cubic units.

Now, We can formulate;

⇒ V = 27 cubic units.

⇒ V = 3 × 9 cubic units.

⇒ V = 3 × 3² cubic units.

Thus, The correct statement which is true about all perfect cubes is,

⇒ A perfect cube represents 3 times the area of a face of the cube.

Learn more about the rectangle visit:

https://brainly.com/question/2607596

#SPJ1

Answer:

10

Step-by-step explanation:

Answer:

10 apples

Step-by-step explanation:

20% of 50 = 10

10 apples

Answer:

P = 3s  where "s" is the measure of a side.

Step-by-step explanation:

Perimeter of a equilateral triangle is s + s + s or 3s because all sides are equal.

Let s = a side and there are three equal sides in an equilateral triangle.

P = 3s

Answer:

12!

Step-by-step explanation:

А=12*11*10*9*8*7*6*5*4*3*2*1=12!=479001600

Answer:

4 in(a)

Step-by-step explanation:

height-?

volume-314

radius-5

pie-22÷7 or 3.14

volume= πrsquared h

314=3.14×5×5×h

314= 78.5h

314÷78.5

= 4 in

Answer: $350.00

Step-by-step explanation:

Answer:

$350

Step-by-step explanation:

if the sale is 30% we have to find what is 30% of 500 so we can subtracted from what we pay .

line up what you know:

$500 represents  100%

    $x represents  30 %

cross multiply

x*100 = 500* 30 ; divide both sides by 100

x= 500*30 /100 = 150

the sale price is 500-150= $350

No, the rank of the product of two n by n square matrices A and B, denoted as AB, cannot be less than n-1 if both A and B have ranks of n-1.

According to the Rank-Nullity theorem, for any matrix M, the sum of its rank and nullity is equal to the number of columns in M. In this case, the number of columns in AB is n, so the sum of the rank and nullity of AB must be n.

If rank(A) = rank(B) = n-1, it means that both A and B have nullity 1. The nullity of a matrix is the dimension of its null space, which consists of all vectors that get mapped to the zero vector when multiplied by the matrix. Since both A and B have rank n-1, their null spaces consist only of the zero vector.

Now, considering AB, if the rank of AB were less than n-1, it would mean that the nullity of AB is greater than 1.

However, this would violate the Rank-Nullity theorem since the sum of the rank and nullity of AB must be n, which is the number of columns.

Therefore,  if rank(A) = rank(B) = n-1, the rank of AB cannot be less than n-1.

For more such questions on rank

https://brainly.com/question/28839672

#SPJ8

You have the following points for the relation between minutes and miles respectively:

(4 , 22)

(8, 44)

In order to calculate the constant of porportionality use the formula:

m = (y2 - y1)/(x2 - x1)

where (x1,y1) and (x2,y2) are the given points:

m = (44 - 22)/(8 - 4)

m = 22/4

m = 5.5

Hence, the constant of proportionality is 5.5

THe meaning of the point (4 , 22) is:

4 means 4 miles and 22 means 22 minutes. That is, it has been traveled 4 miles in 22 minutes.

The area of the rectangular field that is not cement patio is  28x² square units

It is important to note that the formula for determining the area of a rectangle is expressed as;

A = lw

Where;

From the information given, we have that;

Length of the cement patio = 5x

Width of the cement patio = 3x

Total length of the rectangular field = 12x

Total width of the rectangular field = 7x

Then,

Length of the non- cement patio = 12x - 5x = 7x

Width of the non- cement patio = 7x - 3x = 4x

Now, substitute the values into the formula for area

Area = 7x (4x)

multiply the values

Area = 28x² square units

Hence, the value is 28x² square units

Learn more about area here:

https://brainly.com/question/25292087

#SPJ1

Answer: 20

Step-by-step explanation:

49.87% is the probability that a worker selected at random makes between 400 dollars and 550 dollars.

To find the probability that a worker selected at random makes between $400 and $550, we can use the properties of the normal distribution.

Given that the weekly wages are normally distributed with a mean (μ) of $400 and a standard deviation (σ) of $50, we can use these parameters to standardize the values and then find the corresponding probabilities.

To standardize the values, we use the z-score formula:

z = (x - μ) / σ

where x is the value we want to find the probability for.

For $400:

z1 = (400 - 400) / 50 = 0

For $550:

z2 = (550 - 400) / 50 = 3

Now, we can use the standard normal distribution table or a calculator to find the probabilities associated with these z-scores.

The probability of a worker making less than or equal to $400 is the same as the probability of z1 or less, which is P(z ≤ 0). From the standard normal distribution table, we find that P(z ≤ 0) is approximately 0.5.

The probability of a worker making less than or equal to $550 is the same as the probability of z2 or less, which is P(z ≤ 3). From the standard normal distribution table, we find that P(z ≤ 3) is approximately 0.9987.

Therefore, the probability that a worker selected at random makes between $400 and $550 is the difference between these two probabilities:

P(400 ≤ x ≤ 550) = P(z ≤ 3) - P(z ≤ 0) ≈ 0.9987 - 0.5 ≈ 0.4987

So, the probability is approximately 0.4987 or 49.87%.

Using the z-score, we transformed the values into a standard normal distribution, looked up the probabilities associated with the z-scores from a standard normal distribution table, and found the difference in probabilities to determine the probability of the worker's wage falling between $400 and $550.

Know more about probability here:

https://brainly.com/question/13604758

#SPJ11

The cumulative relative frequency for flossing 3 times per week is 58.57%.

a. Let's complete the table.

We can calculate the missing relative frequency for 0 times flossing per week by dividing the frequency (4) by the total number of people (70).

Relative Frequency for 0 times flossing = 4/70 = 0.0571 (rounded to 4 decimal places)

For 6 times flossing per week, the frequency is missing.

We can calculate it by summing up the frequencies for all other days and subtracting that from the total number of people.

Missing frequency for 6 times flossing = 70 - (4 + 11 + 15 + 11 + 6 + 7 + 6) = 70 - 60 = 10

Now, let's calculate the cumulative frequency for 5 times flossing per week.

Cumulative Frequency for 5 times flossing = Cumulative Frequency for 4 times flossing + Frequency for 5 times flossing = 47 + 7 = 54

The completed table looks like this:

of times floss per week | Frequency | Relative Frequency | Cumulative Frequency

0 | 4 | 0.0571 | 4

1 | 11 | 0.1571 | 15

2 | 15 | 0.2143 | 30

3 | 11 | 0.1571 | 41

4 | 6 | 0.0857 | 47

5 | 7 | 0.1 | 54

6 | 10 | 0.1429 | 64

7 | 6 | 0.0857 | 70

b. The cumulative relative frequency for flossing 3 times per week is the cumulative frequency for 3 times flossing divided by the total number of people (70).

Cumulative Relative Frequency for 3 times flossing = Cumulative Frequency for 3 times flossing / Total number of people = 41 / 70 = 0.5857 (rounded to 4 decimal places)

The cumulative relative frequency for flossing 3 times per week is 58.57%.

Read more about cumulative relative frequency here:

https://brainly.com/question/29739263

#SPJ1

Answer: I don't have the ability to create and insert images or charts. However, I can provide instructions on how to draw a diagram and write the equations for the area and perimeter of the lawn based on the given specifications.

To draw the diagram, start by sketching an irregular shape that meets the given specifications. Label the lengths of all sides of the lawn using the scale of 1 box = 1 square foot. For example, if one side of the lawn is 8 feet long, label it as 8 boxes.

Once you have drawn the diagram and labeled the lengths of all sides of the lawn, you can use the following equations to find the area and perimeter of the lawn:

To find the area of the lawn, use the formula for the area of an irregular shape, which involves dividing the shape into smaller, simpler shapes and adding their areas together. For example, you could divide the lawn into a rectangle and a triangle and then use the following formula:

Area = Area of rectangle + Area of triangle

Area of rectangle = length x width

Area of triangle = 1/2 x base x height

To find the perimeter of the lawn, add up the lengths of all the sides of the lawn. For example:

Perimeter = length of side 1 + length of side 2 + length of side 3 + ... + length of last side

Make sure to substitute the appropriate values into the equations and simplify your answers.

Step-by-step explanation:

Answer: they are uneven

Step-by-step explanation: the 30 has to be 15 on each side and the 16 stays the same

Answer:

y = 3/4x - 2

General Formulas and Concepts:

Pre-Alg

Algebra I

Slope-Intercept Form: y = mx + b

Slope Formula: \(m=\frac{y_2-y_1}{x_2-x_1}\)

Step-by-step explanation:

Step 1: Define points

Find some points from the graph.

y-intercept (0, -2)

Point (-4, -5)

Step 2: Find slope m

Step 3: Write linear equation

y = 3/4x - 2

Solution

We are given

Here

The discriminant D is

Since, the discriminant is positive, we have two x- intercept

Answer:

1/4 is the clope of the line

Step-by-step explanation:

a slope is just a rise ofver run from one dot to anothor so you go up 1 and over 4 and if you dont do the 2 dots that are closest to each other you have to simplify you r exspresion you will always get 1/4 on this graph

Answer:

9

Step-by-step explanation:

use a calculator of just think about it

Answer:

9.00

Step-by-step explanation: