Help please, hurry​

The estimated mean amount of money spent per household on internet service each month is $59.95 with confidence interval.

To calculate the estimated mean amount of money spent per household on internet service each month, we first need to find the lower and upper bounds of the confidence interval. The lower bound is $47.45 and the upper bound is $72.45. We then take the average of these two numbers to get the estimated mean. The average of $47.45 and $72.45 is

($47.45 + $72.45) / 2

= $59.95.

Therefore, the estimated mean amount of money spent per household on internet service each month is $59.95.

Learn more about confidence interval here

https://brainly.com/question/24131141

#SPJ4

Answer:

45%

Step-by-step explanation:

1,450 - 1,000 = 450

the 450 becomes 0.45

to make 0.45 a percent, we multiply it by 100

0.45 x 100 = 45

45%

Answer:

The sum of the first 8 terms is 39360

Step-by-step explanation:

A geometric series is a series of numbers that have a common ratio. The series given to us is the following: 12, 36, 108,... We can see that there is a common ratio of 3 (108/36 = 36/12 = 3). Therefore, this series is a geometric series. Since we know that, we can use the sum of geometric series formula to find the sum of the first 8 terms:

\(S_n=\frac{a_1(1-r^n)}{1-r}\)

In this formula, \(S_n\) is the sum of the first n terms of the series (in our case, n would be 8). \(a_1\) is the first term in the series, which is 12 in our case. r is the common ratio between the terms (which is 3). Finally, n is the number of terms, and since we know we are looking for the sum of the first 8 terms, n is 8. Now, we can plug in our known quantities and solve:

\(S_n=\frac{a_1(1-r^n)}{1-r}\\\\S_8=\frac{12(1-3^8)}{1-3}\\\\S_8=\frac{12(1-6561)}{-2}\\\\S_8=-6(-6560)\\\\S_8=39360\)

Therefore, the sum of the first 8 terms is 39360

Answer:

20

Step-by-step explanation:

When two numbers vary inversely, they always multiply to the same product, in this case, it is 80, because it is 8 x 10(product of two known values of p and q). This means, for q = 4, we can write:

p * 4 = 80

This means that p is equal to 20.

The value of p is 20 when q=4

Let there are two variables p and q

Then, p and q are said to be directly proportional to each other if

p = kq

where k is some constant number called constant of proportionality.

When two numbers vary inversely, then the will always multiply to the same product,

Here it is 80, because it is 8 x 10

Then product of two known values of p and q).

This means, for q = 4, we can write:

p x 4 = 80

This means that p is 20.

Learn more about directly inversely proportional relationship variable here:

https://brainly.com/question/13082482

#SPJ2

Answer:

must be parallel

Step-by-step explanation:

They must be parallel.

Answer:

Please find attached the drawing of quadrilateral KLMN created with MS Whiteboard using the Ink to Shape command

(a) Two pairs of opposite sides are \(\overline {KN}\), \(\overline {LM}\) and \(\overline {KL}\), \(\overline {NM}\)

(b) Two pairs of opposite angles are ∠LKN, ∠LMN, and ∠KLM and ∠KNM

(c) Two pairs of adjacent sides are \(\overline {KN}\), \(\overline {NM}\) and \(\overline {KL}\), \(\overline {LM}\)

(d) Two pairs of adjacent angles are ∠LKN, ∠KLM and ∠LMN, ∠KNM

Step-by-step explanation:

Part 1:

(a) Fill in the missing table cells:

Table 1: Impact Strength (ft-lb/in)

1 1 2 3 4 5 5

Point Values

55 56 55 50 46

(b) The Sum of Squares equals: 73.2

(c) This variance equals: 18.3

(d) The standard deviation equals: 4.278

(e) The deviation for the first observation equals: 2.6

(f) The Z-score for the fifth observation equals: -1.4961

Part 2:

We wish to convert from foot-pound/in to J/m, so let y be the strength in J/m. There is 1 ft-lb/in for every 53.35 J/m.

G) -

H) s2y =

I) Sy =

J) The Z-score for the fifth transformed observation is:

Part 1:

(a) The missing table cells are not provided in the question.

(b) The Sum of Squares is calculated by summing the squares of the deviations of each data point from the mean. Since the values are not provided, we cannot calculate the Sum of Squares.

(c) Variance is the average of the squared deviations from the mean. It is calculated by dividing the Sum of Squares by the number of data points. In this case, the variance is given as 18.3.

(d) Standard deviation is the square root of the variance. It is calculated as the square root of the variance. In this case, the standard deviation is given as 4.278.

(e) The deviation for the first observation is provided as 2.6. It represents the difference between the first observation and the mean.

(f) The Z-score for an observation is a measure of how many standard deviations it is away from the mean. The Z-score for the fifth observation is given as -1.4961.

Part 2:

In order to convert from foot-pound/in to J/m, we need to use the conversion factor of 1 ft-lb/in = 53.35 J/m.

G) - The missing value is not provided in the question.

H) The variance of the transformed variable, y, can be calculated by multiplying the variance of the original variable, x, by the square of the conversion factor (a^2). However, since the variance of x is not provided, we cannot calculate s2y.

I) The standard deviation of the transformed variable, y, can be calculated by multiplying the standard deviation of the original variable, x, by the absolute value of the conversion factor (|a|). However, since the standard deviation of x is not provided, we cannot calculate Sy.

J) The Z-score for the fifth transformed observation can be calculated by subtracting the mean of the transformed variable from the fifth transformed observation and then dividing it by the standard deviation of the transformed variable.

However, since the mean and standard deviation of the transformed variable are not provided, we cannot calculate the Z-score.

To know more about Strength (ft-lb/in), refer here:

https://brainly.com/question/31309343#

#SPJ11

Answer:

  67 square units

Step-by-step explanation:

The area using the left-hand sum is the sum of products of the function value at the left side of the interval and the width of the interval.

The attachment shows a table of the x-value at the left side of each interval, and the corresponding function value there. The interval width is 1 unit in every case, so the desired area is simply the sum of the function values.

The approximate area is 67 square units.

Split up the interval [0, 6] into 6 equally spaced subintervals of length \(\Delta x = \frac{6-0}6 = 1\). So we have the partition

[0, 1] U [1, 2] U [2, 3] U [3, 4] U [4, 5] U [5, 6]

where the left endpoint of the \(i\)-th interval is

\(\ell_i = i - 1\)

with \(i\in\{1,2,3,4,5,6\}\).

The area under \(f(x)=x^2+2\) on the interval [0, 6] is then given by the definite integral and approximated by the Riemann sum,

\(\displaystyle \int_0^6 f(x) \, dx \approx \sum_{i=1}^6 f(\ell_i) \Delta x \\\\ ~~~~~~~~ = \sum_{i=1}^6 \bigg((i-1)^2 + 2\bigg) \\\\ ~~~~~~~~ = \sum_{i=1}^6 \bigg(i^2 - 2i + 3\bigg) \\\\ ~~~~~~~~ = \frac{6\cdot7\cdot13}6 - 6\cdot7 + 3\cdot6 = \boxed{67}\)

where we use the well-known sums,

\(\displaystyle \sum_{i=1}^n 1 = \underbrace{1 + 1 + \cdots + 1}_{n\,\rm times} = n\)

\(\displaystyle \sum_{i=1}^n i = 1 + 2 + \cdots + n = \frac{n(n+1)}2\)

\(\displaystyle \sum_{i=1}^n i^2 = 1 + 4 + \cdots + n^2 = \frac{n(n+1)(2n+1)}6\)

Answer:

40

Step-by-step explanation:

so it is just like a regular equation like 30+10=40 but your just finding what A means so 40 yea

The probability of observing the experiment result, a sample mean, for example, or something more unusual just by chance if the null hypothesis is true is the definition of "P-Value."

A null hypothesis is a sort of statistical hypothesis which asserts that there is no statistical significance in a particular set of observations.

Using sample data, hypothesis testing is performed to determine the believability of a theory. It really is expressed as H0 and is also known to simply as "null."

Some key features regarding null hypothesis are-

To know more about null hypothesis, here

https://brainly.com/question/14016208

#SPJ4

Here, we have two congruent triangles

Since they are congruent, they have similar and equal angles.

From the diagram, we can see that;

6x - 29 = 115 (They are both topmost angles of both triangles)

Solving this, we have;

6x = 115 + 29

6x = 144

divide both sides by 6

x = 144/6

x = 24°

Furthermore, we can see that;

4z - 32 = 36

4z = 36 + 32

4z = 68

z = 68/4

z = 17°

And lastly;

(3y-1) + 115 + (4z-32) = 180 ( sum of angles in a triangle)

Since z = 17, 4z - 32 will be 4(17)-32 = 68 - 32 = 36

Thus;

3y - 1 + 115 + 36 = 180

3y + 150 = 180

3y = 180 -150

3y = 30

divide both sides by 3

y = 30/3

y = 10°

x = 24° , y = 10° and z = 17°

Answer:

y = 7/5x + -1

Step-by-step explanation:

First let's find the slope. To do that you find the difference between the given coordinate points. The slope I got was 7/5.

Then plug in the x and y values in the formula y = mx + b

6 = 7/5(5) + b

6 = 7 + b

-1 = b

If the y-intercept (b) is -1 we can complete the equation now.

y = 7/5x + -1

Hope that helps and have a great day!

To find the average single rate, we need to first calculate the average double rate. The average single rate is $75.00.

Double occupancy rate = 50%
So, the number of double occupancy rooms = 80 x 50% = 40

Occupancy rate = 60%
So, the number of single occupancy rooms = 80 x (100% - 60%) = 32

Total occupancy = number of single occupancy rooms + number of double occupancy rooms = 32 + 40 = 72

Total revenue generated from room rates = average room rate x total occupancy

Total revenue = $80.00 x 72 = $5,760.00

Let the average double rate be x.
Then, the average single rate would be (x - $5.00)

Total revenue from double occupancy rooms = 40 x x = $40x
Total revenue from single occupancy rooms = 32 x (x - $5.00) = $32x - $160.00

Total revenue from room rates = Total revenue from double occupancy rooms + Total revenue from single occupancy rooms

$5,760.00 = $40x + $32x - $160.00

$5,920.00 = $72x

x = $82.22 (rounded to two decimal places)

So, the average double rate is $82.22, and the average single rate would be $77.22 (i.e. $82.22 - $5.00).

To find the average single rate, we'll follow these steps:

1. Calculate the total revenue from the motel rooms.
2. Calculate the revenue from double occupancy rooms.
3. Calculate the revenue from single occupancy rooms.
4. Determine the number of single occupancy rooms.
5. Divide the single occupancy room revenue by the number of single occupancy rooms to find the average single rate.

Step 1: Total revenue
Average room rate = $80.00
Occupancy rate = 60%
Total rooms = 80
Total occupied rooms = 80 * 60% = 48 rooms
Total revenue = 48 rooms * $80.00 = $3,840

Step 2: Double occupancy revenue
Double occupancy rate = 50%
Number of double occupancy rooms = 48 rooms * 50% = 24 rooms
Double occupancy room rate = $80.00 + $5.00 (spread) = $85.00
Double occupancy revenue = 24 rooms * $85.00 = $2,040

Step 3: Single occupancy revenue
Total revenue - Double occupancy revenue = Single occupancy revenue
$3,840 - $2,040 = $1,800

Step 4: Number of single occupancy rooms
Total occupied rooms - Double occupancy rooms = Single occupancy rooms
48 rooms - 24 rooms = 24 rooms

Step 5: Average single rate
Single occupancy revenue ÷ Number of single occupancy rooms = Average single rate
$1,800 ÷ 24 rooms = $75.00

So, the average single rate is $75.00.

Learn more about average at: brainly.com/question/24057012

#SPJ11

Answer:

36000

Step-by-step explanation:

Given the following

Principal = 60,000

Rate = 15%

Time = 4years

Using the simple interest formula

SI = PRT/100

SI = 60000*15*4/100

SI = 600 * 60

SI = 36,000

Hence the interest paid after 4 years is 36000

Answer:

first question is B

second F

third C

fourth pretty sure its C

last C

Step-by-step explanation:

Answer:

72600

Step-by-step explanation:

thats it calculator lng yan

Answer:

x+1 , x<-1

x²-bx-4  , -1≤x≤4

1/2 x +a

substitute x=-1 , continuous everywhere

x+1=x²-bx-4 when x=-1

-1+1=-1²-b-4

then for :

x²-bx-4=1/2 x +a for x=4

4²-4b-4=1/2x+a

16-4(3)-4=4/2+a

16-12-4-2=a

the equations will be :

x+1

x²-3x-4

1/2x-2

I hope this help

As per the sampling technique, Let us consider what you know about the sampling distribution of the sample proportion. this sampling distribution will have a center equal to the population proportion, or p.

Here we have to find  what you know about the sampling distribution of the sample proportion. This sampling distribution will become more variable as the sample size increases.

Here for the given question, let us check all the given statements in the options

Here we know that the shape is approximately normal. Then the given option will be false.

Next, it is collection of all samples taken from the population, So the given option will be false

Now, we have to check as the sample size increases, the value of n increases. here n is the value on the denominator of the equation of standard deviation.

Therefore, due to an increase in the value of n, then there will be decreases in the standard deviation.

Then the less standard deviation means a small variance.

Therefore, as a result, as the sample size grows, the variation will be minimal.

So, the center is the same as the sample proportion p.

Therefore, this is correct.

To know more about Sampling here.

https://brainly.com/question/28975411

#SPJ4

Based on the explanation below, the conclusion that Elan is tired because Elan stayed up late is invalid.

In the question, it is stated that if Elan stays up late, he will be tired the next day.

However, staying up late is not the only thing that could make Elan get tired.

This implies that there are so many other things than can make Elan get tired such as working for long hours.

It is possible that Elan was tired because Elans worked long hours.

By implication, the conclusion is invalid.

Learn more about the conclusion here: https://brainly.com/question/15292067.

#SPJ1

The numbers arranged in order from least to greatest is: √146, 12.39, 12.62, 12⅝, and 12¾. The third option is correct.

The ordering of numbers refers to arranging numbers in a specific sequence based on their magnitude or value. The ordering of numbers is determined by their relative values. Comparisons are made between numbers to determine their position in the order.

12⅝ = 101/8 = 12.645

12.62 = 12.62

√146 = 12.0830

12.39 = 12.39

12¾ = 51/4 = 12.75

Therefore, the numbers arranged in order from least to greatest is: √146, 12.39, 12.62, 12⅝, and 12¾.

Read more about numbers here:https://brainly.com/question/1094377

#SPJ1

a. The chart did not maintain consistent scaling

b. The graph is not the appropriate graph type to display such data

c.  The display had inaccurate or distorted visual representations

When the actual data may not support it, changing the scales on the axes might give the appearance of big changes or differences.

The visual effect of data can be exaggerated or minimized, for instance, by adopting a non-linear scale or deleting specific sections of the axis.

So it important to Choose appropriate graph type that best represents the data and the relationship you want to convey.

It also advisable to make use of  clear and accurate labeling with descriptive titles and units of measurement.

Learn more about graphs at:

https://brainly.com/question/19040584

#SPJ1

the width of the river is approximately 64.03 feet.

To determine the width of the river, we can use the concept of triangle similarity.

Let's assume that the river width is represented by the variable "x".

From the information given, we have a right triangle formed by the river, the fishing hole, and the campsite. The campsite is located 200 feet from the fishing hole, and the river width is the unknown side.

Using the Pythagorean theorem, we can set up the equation:

x^2 + 200^2 = (200 + 110)^2

Simplifying the equation:

x^2 + 40000 = 44100

x^2 = 44100 - 40000

x^2 = 4100

Taking the square root of both sides:

x = sqrt(4100)

x ≈ 64.03 feet

Therefore, the width of the river is approximately 64.03 feet.

to know more about equation visit:

brainly.com/question/649785

#SPJ11

Answer:

62

Step-by-step explanation:

1. To find the total area, we must find the area of the three individual gardens and sum them together

2. Since the gardens are square, the area is equal to the side length squared

3. Therefore, square the sides and sum:

3^2 = 9

7^2 = 49

2^2 = 4

4+9+49 = 62

Answer:

Step-by-step explanation:

The amount of yogurt that Karolina used when making 800 ml of salad is 300 ml.

A salad dressing is made by mixing yoghurt and mayonnaise in the ratio

3:5. For 800 ml of salad:

Amount of yoghurt = (3 / (3 + 5)) * 800 ml = 300 ml

The amount of yoghurt that Karolina used when making 800 ml of salad is 300 ml.

Answer:

A.

Step-by-step explanation:

A quadratic equation is raised to a degree of 2. Because there is an \(x^{2}\) term, it is considered a quadratic equation.

Answer:

The curve will touch the x-axis at x = 2, but not pass through it.

Step-by-step explanation:

I got it right on my test.

The probability that you choose exactly 30 cents is 1/3.

To find the probability of choosing exactly 30 cents, we would first find the probability of choosing just a quarter and a nickel. This would be gotten this way:

4/9 * 3/8

= 12/72

= 1/6

The probability of choosing a nickel and a quarter would be:

3/9 * 4/8

= 12/72

= 1/6

Now we add up the probabilities to get the chance of choosing exactly 30 cents and this is:

1/6 + 1/6

= 2/6

=1/3

Learn more about probability here:

https://brainly.com/question/13604758

#SPJ4

A. The equation of the straight-line model relating driving accuracy to driving distance is y = β0 + β1x, where y represents driving accuracy, x represents driving distance, β0 represents the y-intercept, and β1 represents the slope.

B. Using the least squares method, the prediction equation for the given data is ^y = 232.4 - 0.7639x, where ^y represents the predicted accuracy for a given distance x.

C. The estimated y-intercept has no practical interpretation since a drive with 0% accuracy is outside the range of the sample data.

D. The estimated slope indicates that for each additional yard in distance, the accuracy is estimated to decrease by 0.7639%.

E. The slope will help determine if the golfer's concern is valid since the sign of the slope determines whether the accuracy increases or decreases with distance.

For more questions like Slope click the link below:

https://brainly.com/question/360544

#SPJ11

Answer:

I'm assuming #2 but just wanted to make sure.

Step-by-step explanation:

Possibility 1:

100 * 0.02 =    2.00

100 * 0.08 =    8.00

124 * 0.12 =  +14.88

                   $24.88

Possibility 2:

324 * 0.12 = $38.88

The location of all points of inflection of the function f'(x) = (x - 2)(x-4)(x - 5) are option (d) 11- √7/3,  11+ √7/3.

To find the points of inflection of the function f, we need to find its second derivative and set it equal to zero, and then solve for x. If the second derivative changes sign at x, then x is a point of inflection.

Taking the derivative of f'(x), we get

f''(x) = 3x^2 - 22x + 32

Setting f''(x) = 0, we get

3x^2 - 22x + 32 = 0

We can solve this quadratic equation using the quadratic formula

x = [22 ± sqrt(22^2 - 4(3)(32))] / (2*3)

x = [22 ± sqrt(244)] / 6

x = (11 ± sqrt(61))/3

Therefore, the points of inflection of the function f are

x = (11 - sqrt(61))/3 ≈ 0.207

x = (11 + sqrt(61))/3 ≈ 3.793

So the answer is (d) 11- √7/3,  11+ √7/3.

Learn more about points of inflection here

brainly.com/question/30767426

#SPJ4

The location of all points of inflection of the function f'(x) = (x - 2)(x-4)(x - 5) are option (d) 11- √7/3,  11+ √7/3.

To find the points of inflection of the function f, we need to find its second derivative and set it equal to zero, and then solve for x. If the second derivative changes sign at x, then x is a point of inflection.

Taking the derivative of f'(x), we get

f''(x) = 3x^2 - 22x + 32

Setting f''(x) = 0, we get

3x^2 - 22x + 32 = 0

We can solve this quadratic equation using the quadratic formula

x = [22 ± sqrt(22^2 - 4(3)(32))] / (2*3)

x = [22 ± sqrt(244)] / 6

x = (11 ± sqrt(61))/3

Therefore, the points of inflection of the function f are

x = (11 - sqrt(61))/3 ≈ 0.207

x = (11 + sqrt(61))/3 ≈ 3.793

So the answer is (d) 11- √7/3,  11+ √7/3.

Learn more about points of inflection here

brainly.com/question/30767426

#SPJ4

The probability that the coin will land heads at least twice when tossed three times is 3/8.

The question is asking for the probability that a coin will land heads at least twice when tossed three times.
To find this probability, we can use the concept of binomial probability.
Determine the total number of possible outcomes when tossing a coin three times. Since each toss has two possible outcomes (heads or tails), the total number of possible outcomes is \(2^3\) = 8.
Determine the number of favorable outcomes where the coin lands heads at least twice. There are three possible scenarios where the coin can land heads at least twice: HH, HHT, HTH, where H represents heads and T represents tails. So, there are 3 favorable outcomes.
Calculate the probability by dividing the number of favorable outcomes by the total number of possible outcomes. Probability = favorable outcomes / total outcomes = 3 / 8.

Read more about probability here:
https://brainly.com/question/31828911

#SPJ11