i don’t understand what i’m doing and i need help

The approximate probability that less than 10 out of 200 U.S. citizens are working more than 50 hours a week on average is 0.019

We can use the normal distribution to approximate the probability that less than 10 out of 200 U.S. citizens are working more than 50 hours a week on average.

To do this, we have to standardize the variable by subtracting the mean and dividing by the standard deviation.

In this case, X = (50 - 37) / hours = 1.83

We know that for a standard normal distribution, the probability of X being less than a certain value can be found using a standard normal table or a calculator with a built-in standard normal cumulative distribution function (CDF).

Now, we will use the cumulative distribution function to find the probability of less than 10 out of 200 working more than 50 hours a week on average. Using a standard normal table or calculator, we can find the probability of having X < -2.04.

P(X < -2.04) = 0.0188

So the approximate probability that less than 10 out of 200 U.S. citizens are working more than 50 hours a week on average is 0.0188 which rounding it off to the third decimal place we get 0.019.

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Answer by solving the expression 35 /2 using different methods are:

a. Area model : 35 /2  can be expressed as 17. 5 + 17.5 .(attached figure)

b. Long division method : 35 /2 = 17 + 1/2

c. Distributive property expressed as 35/2 = ( 34 + 1 ) × 1/ 2.

a. Area model.

Expression 35 /2 solved by area model is attached in the figure.

One part of 35 is divided into two parts each of 17.5 .

17.5 + 17.5 = 35

b. Long division.

How many 2's are there in 3

Answer is 1.

3−1⋅2=3−2=1

Write down the next digit of the dividend.

How many 2's are there in 15

Answer is 7

15−7⋅2=15−14=1.

( 35 /2 ) = 17 + ( 1/2)

c. Distributive property

35 /2

= ( 34 + 1 ) × 1/ 2

= 34 /2 + 1 /2

= 17  + 1 /2

= 17 + 0.5

= 17.5

Therefore, the solution of 35/2 using different methods are:

a. Using area model : 17.5 + 17.5  represent 35/2.

b. long division : 35 /2 = 17 + 1/2

c. Distributive property: 35/2 = ( 34 + 1 ) / 2

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Here is a simple framework to model the problem as an Integer Programming (IP) problem and solve it using Excel Solver:

Let x(i,j) be the number of full-time employees assigned to work on day i (1 <= i <= 7) and given day off on day j (1 <= j <= 7).

a. Work days constraint: For each day i, the number of employees working must meet the demand:

∑(j=1 to 7) x(i,j) = demand(i) (1 <= i <= 7)

b. Availability constraint: Each employee can work only 5 consecutive days, so for each day j (1 <= j <= 7), the number of employees given day off on day j must be less than or equal to the number of employees working on day j-5:

∑(i=1 to 7) x(i,j) <= ∑(i=j-5 to j-1) x(i,j-5) (1 <= j <= 7)

The objective is to minimize the total number of full-time employees hired, so the objective function is:

minimize: ∑(i=1 to 7) ∑(j=1 to 7) x(i,j)

Excel Solver can be used to find the optimal solution to the IP problem. The constraints and objective function should be set up in the spreadsheet, and Solver should be configured to use the integer constraint option. The solution will give the optimal number of full-time employees hired and their assignment on each day.

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Answer: I think x=22.

Step-by-step explanation:

If you look at half of the circle you can see a line in it right? This line measures to 180 degrees. This is a right triangle. Usually triangles have a little box in the corner to tell you that is it indeed a right triangle. I don't know why this one doesn't. anyways, if you add 90+68, you get 158. Now you need to get to 180 by simply adding 22. Thats why i think the answer is 22. Sorry if im wrong.

Partial products can be used to multiply two or more numbers.

6 bags × cat food cost

Yes, this relationship is a Funtion.

The relationship between the no of gallons of milk purchased and the total cost can be represented by this equation:
y = 3.5x

where y is the total cost  and x represents the number of gallons of milk purchased. A function is a collection of ordered pairs (x, y) with exactly one value of y for each value of x. for each input (x), just one output (y) is created.

In this situation, there is only one equivalent value of y for each value of x .We may see this by putting different value of x into the equation and get ing a different result for y.
For example, when x = 1, y = 3.5 ×1 = 3.5
when x = 2, y = 3.5 × 2 = 7
when x = 3, y = 3.5 × 3 = 10.5
and so on.

So, the relationship between the number of gallons of milk purchased and the total cost is a Funtion.

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The side length that could be a right triangle are

Applying Pythagoras theorem, for each side length we solve for the longest side in each case assuming the longest side is x

Using Pythagoras theorem given by the  the formula

hypotenuse² = opposite² + adjacent²

checking for 4 7 8

let x be the required distance

x² = 4² + 7²

x² = 16 + 49

x² =  65

x = √65

this is not a right triangle

checking for 6 8 10

let x be the required distance

x² = 6² + 8²

x² = 36 + 64

x² =  100

x = √100

x = 10

this is a right triangle

checking for 5 12 13

let x be the required distance

x² = 5² + 12²

x² = 25 + 144

x² =  169

x = √169

x = 13

this is a right triangle

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1. The equation when Buggo crawls did 28 minutes at a rate of -2 centimeters per minute will be x = -2 × 28

2. The equation when Buggy slides for 3.2 seconds at -8.1 millimeters per second will be: y = -8.1 × 3.2

3. The equation when Buggum creeps for 3.5 seconds and finishes at -28.5 centimeters will be 3.5x = -28.5

An equation simply has to do with the statement that illustrates the variables given. In this case, it is vital to note that two or more components are considered in order to be able to describe the scenario.

The equation when Buggo crawls did 28 minutes at a rate of -2 centimeters per minute will be:

Let x = total centimeters

x = -2 × 28

The equation when Buggy slides for 3.2 seconds at -8.1 millimeters per second will be:

Let y = ital millimeters

y = -8.1 × 3.2

The equation when Buggum creeps for 3.5 seconds and finishes at -28.5 centimeters will be 3.5x = -28.5

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The two missing positive numbers are; 50/3 and 200/3

The difference between two positive numbers is 50. Let the two numbers be x and y and as such we have;

x - y = 50   -----(1)

One number is four times the other number. Thus;

x = 4y  -----(2)

Put 4y for x in eq 1 to get;

4y - y = 50

3y = 50

y = 50/3

Thus;

x = 4(50/3)

x = 200/3

We conclude that x and y above are the two positive numbers.

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246960 6-digit numbers contain exactly one 3, one 4, and one 5 as digits.

There are a total of 6 digits that make up any of the numbers in 0 to 999999 with the given condition

The total numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

This can be represented as UVWXYZ

Digit 3 can occupy any of the 6 positions

Digit 4 can occupy any of the (6 - 1) positions

Digit 5 can occupy any of the (6 - 2) positions

The remaining 7 digits will occupy the last 3 positions in the following ways:

The first of the 7 digits can be selected from any of  7 ways

The second can be selected from any of 7 ways

The third can be selected from any of 7 ways

So, the total number of selection is:

= 6 × 6 × (6 - 1) × (6 - 2) × 7 × 7 × 7

= 36 × 5 × 4 × 343

= 246960

Therefore there are 246960 numbers.

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Answer:

For y=2x+1

The line y=2x+1 has a y-intercept of +1, so begin with a point at (0,1)

and its slope is 2/1, which means from there you go Up 2 and Right 1.

Follow that pattern until you can draw a straight line through all the points.

For -2x=y=-2

In this point it only passes (0,2) and (1.0)

Have a wonderful day! :-)

No, we cannot conclude that studying longer hours leads to higher GPAs based on this survey.

This survey only provides us with the average GPAs and average hours per week spent studying for a sample of 218 undergraduates from Duke University who took an introductory statistics course in spring 2012. This is not enough information to draw a conclusion about the correlation between hours of study and GPA. To do this, we would need to look at the correlation between the two variables. To calculate the correlation, we would need the individual data points of the GPAs and hours of study for each respondent. We could then calculate the Pearson correlation coefficient and the significance of the correlation. This would provide us with a more definitive answer to our question.

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The probability that this song will be played on at least 2 days out of 4 days is 40.71%.

To calculate the probability that a song will be played on at least two days, you would need to find the probability that it is not played on any of the days (the complement) and then subtract that from 1.

The probability that a song is not played on a given day is 1 - 0.23 = 0.77. To find the probability that it is not played on at least two days, you would raise that probability to the power of the number of days, in this case 2.

So, 0.77^2 = 0.5929. To find the probability that it is played on at least two days, you would subtract that from 1: = 1 - 0.5929

= 0.4071

=40.71%.

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The factor 3 does not occur in pair. Thus, ‘3’ is the smallest number by which 8112 should be divided to get a perfect square.

The LCM of 8, 15, and 20 is 120. Prime factors 2, 3, and 5 do not have a pair in this case. To construct a perfect square, 120 must be multiplied by 2 x 3 x 5. As a result, the least square number divisible by 8, 15, and 20 is 3600.

The smallest square matrix is 2 2 2 2 ; there is no theoretical limit to the highest size square matrix, however anything larger than 10 10 10 10 becomes impossible to manage numerically.4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900, and 961

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If U and V are orthogonal then the magnitude of U times V will be U.V = 0 or |UxV| = uv.

U and V are two orthogonal vectors.

since the angle between them is θ = 90⁰

let u and v be the magnitudes of the vectors U and V respectively.

so first dot-product: If two non-zero vectors are orthogonal than the dot product of these vectors will be zero. Dot product of two vectors is expressed by:

U.V = uv cosθ

since these vectors are orthogonal so,

U.V = uv cos90⁰ = 0

And Cross-product: Magnitude Cross product of two orthogonal vectors will be equal to product of magnitude of these vectors.

|UxV| = uv sin θ

|UxV| = uv sin 90⁰ = uv

Therefore, U.V = 0, |UxV| = uv.

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The solutions to the x and y intercepts are;

1) The slope will be positive.

2) The student is incorrect because (0, 5) is not the x-intercept.

3) The point at which the graph crosses the x axis is; x = 2

4) The point at which the graph crosses the y axis is; y = 6

5) x-intercept is x = 4 and the y-intercept is; y = 2

6) The x-intercept is x = 6 and the y-intercept is; y = 2

7) The x-intercept is x = 2 and the y-intercept is; y = 10

1) The formula for the slope of a graph is;

Slope = Change in y value/change in x value

Thus, if both x and y intercepts are negative, then the slope will be positive.

2) The equation of a line in slope intercept form is;

y = mx + c

where;

m is slope

c is y-intercept

The equation can be rewritten as;

y = -¹/₂x + 5

At y =0,

0 = -¹/₂(x) + 5

x = 8

Thus, (0, 5) is not the x-intercept.

3) The point at which the graph crosses the x axis is the x-intercept which is when y = 0. Thus;

2x + 0 = 4

2x = 4

x = 2

4) The point at which the graph crosses the y axis is the y-intercept which is when x = 0. Thus;

3(0) + y = 6

y = 6

5) 2x + 4y = 8

x-intercept; 2x + 4(0) = 8

x = 4

y-intercept; 2(0) + 4y = 8

y = 2

6) x + 3y = 6

x-intercept; x + 3(0) = 6

x = 6

y-intercept; 0 + 3y = 6

y = 2

7) 5x + y = 10

x-intercept; 5x + 0 = 10

x = 2

y-intercept; 5(0) + y = 10

y = 10

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Part A - The area of the deck is approximately equal to 691.150 square feet.

Part B - The deck requires 3.379 gallons of weather treatment.

Part C - The weather treatment have a cost of $ 121.48.

In this problem we must find the area of the deck around the pool, how many gallons of weather treatment are required and how much is needed to.

Part A - The area of the deck is a circular corona, whose formula is:

A = π · (R² - r²)

Where:

If we know that r = 6 ft and R = 16 ft, then the area of the deck is:

A = π · [(16 ft)² - (6 ft)²]

A = 220π ft²

A ≈ 691.150 ft²

Part B - If we know that a gallon is effective for an area of 204.5 square feet, the number of gallons can be determined by cross multiplication:

x = (691.150 ft² / 204.5 ft²) × 1

x = 3.379

A number of 3.379 gallons are required for weather treatment.

Part C - The cost of the number of gallons (C), in monetary units, is equal to the product of the number of gallons (n), in gallons, and unit cost (c), in monetary units per gallon:

C = n · c

If we know that n = 3.379 gal and c = $ 35.95 / gal, then the cost of the number of gallons is:

C = (3.379 gal) · ($ 35.95 / gal)

C = $ 121.48

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The probability that neither of the people have their ears pierced is 0.6157

What is the probability?

Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, with 0 indicating that an event is impossible and 1 indicating that an event is certain.

The probability of A happening is the number of people who do not have their ears pierced divided by the total number of people in the sample, which is:

P(A) = (2000 - 430) / 2000 = 1570 / 2000 = 0.785

The conditional probability of B given A is the number of people who do not have their ears pierced and are still available to be selected as the second person divided by the total number of people available to be selected as the second person, which is:

P(B|A) = (2000 - 430 - 1) / (2000 - 1) = 1569 / 1999 = 0.7845

Therefore, the probability that neither of the people have their ears pierced is:

P(A) * P(B|A) = 0.785 * 0.7845 = 0.6157

Hence, the probability that neither of the people have their ears pierced is 0.6157

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For the absolute value function, the vertex is at its maximum at (-4,0).

A function is an expression, rule, or law in mathematics that defines a relationship between one variable (the independent variable) and another variable (the dependent variable). Functions are common in mathematics and are required for the formulation of physical relationships in the sciences. A function is defined as a relationship between a set of inputs that each have one output. A function is a relationship between inputs in which each input is related to exactly one output.

Here,

The vertex for the absolute value function is at its maximum at (-4,0).

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The ratio table is presented below and a total of 4 cases of possible.

Given that,

s: the number of cans of soup concentrate

w: the number of cans of water

Ratio: 1:5

so w = 5s

Therefore,

s        w            Total cans of heated soup to serve

1          5                          6

2         10                         12

3         15                          18

4         20                         24

Therefore, a total of four cases are possible to make up to 24 total cans of heated soup to serve at the party.

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Cross multiplying will help us identify the variable if it is the same variable that is present on both sides of the equation. Let's explain with the use of examples. Solve X/5 = 5/X, for instance.

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1 quart equals 2 pints, which equals 4 cups, so 3 quarts equals 12 cups. Dividing the ice cream among 15 people means each gets 1 3/12 cup(s).

Nick has 3 quarts of ice and he wants to split it with 15 members of the team.

To solve this, we have to convert quarts to cups. We have that:

1 quart = 2 pints

and 1 pint = 2 cups

This means that:

1 quart = 2 × 2 cups

1 quart = 4 cups

So, 3 quarts will be:

3 quarts=3 × 4

3 quarts =12

Therefore, dividing the ice cream among 15 people would mean that we have to divide 12 cups by 15 people.

That is:

= 15/12

= [tex]1\frac{3}{12}[/tex]

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The complete question is:

Nick is splitting 3 quarts of ice cream with 15 members of the team. If the ice cream is split evenly, how many cups will each person get?

Explain 1 quart equals _ pints, which equals _ cups, so 3 quarts equals _ cups. Dividing the ice cream among _ people means each gets _ cup(s).

a) Upwards

b) x = -1

c) (-1,-9) (-1,-9)

d) Intercepts of x; and (2, 0) (-4,0)

is y intercept (0,-8)

a) The parabola, as seen, faces upward.

b) To identify the point through the parabola's vertex that precisely divides the parabola into two equal sections, we look at the plot of the graph.

The place where the line has an x-value of -1 is where the axis of symmetry's equation is located.

d) In this case, the vertex marks the circle's lowest point.

As we can see, this is the location where the axis of symmetry passes to divide the parabola symmetrically.

The location's coordinates are as follows:

(-1,-9)

The intercepts (d)

The parabola crosses the x-axis at two places, which are known as the x-intercept.

We have 2 and -4 for this point.

the coordinates of the x-intercepts are (2,0) and

In terms of the y-intercept, it is the y-coordinate of the location where the parabola crosses the y-axis.

The Complete Question.

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The final sales price is equal to $200.

In Mathematics, a percentage simply refers to any number that is expressed as a fraction of hundred (100). This ultimately implies that, a percentage indicates the hundredth parts of any given number.

In order to decrease 250 dollars by 20 percent (20%), we would have to multiply the given amount of money by 80 percent (80%) because it denotes a percentage decrease:

Percentage decrease = 250 × 80/100

Percentage decrease = 250 × 0.8

Percentage decrease = $200.

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Answer:

S(t) is a function, because there is a unique output value (number of students) for each input value (number of years after 2000)

S(t) can be represented by a graph, where the horizontal axis represents the number of years after 2000, and the vertical axis represents the number of students

Step-by-step explanation:

The statements regarding function S are true are:

S(5) = 2024 means there were 2024 students in 2005.

S(10)= S(5) there same number of students in 2005 and 2010.

We have function,

S(t)= 2000t

First, S(0) in 2000 means that there were 2000 students in starting.

Second, S(5) = 2024 means there were 2024 students in 2005.

Third, S(10)= S(5) there same number of students in 2005 and 2010.

Fourth, S(15)- S(10)= -40 means that there were 40 less students in 2015 than in 2010.

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The discount was 17 dollars and 87 cents.

What is a discount?

A discount is a reduction in the price of a product or service. It can be offered for a variety of reasons, such as to encourage sales or to reward loyal customers.

We have,

price of pair of sunglasses for $66,

coupon code discount of 30%,

15% processing fee to the price.

The final price is:

$66 * (1 - 30%) * (1 + 15%)

$66 * 0.7 * 1.15

$53.13

So, the actual discount is,

$(71 - 53.13)

= $17.87

Hence, the discount was 17 dollars and 87 cents.

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The numerical  value of to the nearest tenth is 14.3.

From the diagram, we have a right angle triangle.

Using trig ratio, Tangent = Opposite / Adjacent.

Hence;

tan( Ф ) = Opposite / Adjacent

Plug in the given values and solve for x

tan( 40° ) = 12/ x

tan( 40° ) × x = 12

x = 12 / tan( 40° )

x = 12 / 0.8390996

x = 14.3

Therefore, the value of x is approximately 14.3.

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