Teen cigarette use is down the us centers for disease control conducts the national youth tobacco survey each year. The preliminary results3 of 2019 show that e-cigarette use is up among us teens while cigarette use is down. We examined e-cigarette use in exercise 3. 137 and here we estimate cigarette use. In the sample of 1582 teens, 92 reported smoking a cigarette in the last 30 days. Give notation and define the parameter we are estimating. Give notation and value of the sample statistic. Find the standard error for this estimate. What is z* for a 99% confidence interval? what is the 99% confidence interval? what is the best estimate for the parameter we are estimating? what is the margin of error?

The correct statements regarding the confidence intervals is given as follows:

The 90% confidence interval for juniors is (.549, .744), and the 90% confidence interval for seniors is (.545, .762). Since the intervals overlap, there is not enough evidence to say there is a difference between regular exercise rates among juniors and seniors.

A confidence interval of proportions has the bounds given by the rule presented as follows:

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which the variables used to calculated these bounds are listed as follows:

The confidence level is of 90%, hence the critical value z is the value of Z that has a p-value of [tex]\frac{1+0.9}{2} = 0.95[/tex], so the critical value is z = 1.645.

For juniors, the parameters are given as follows:

[tex]n = 65, \pi = \frac{42}{65} = 0.646[/tex]

Then the lower bound of the interval is of:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.646 - 1.645\sqrt{\frac{0.646(0.354)}{65}} = 0.549[/tex]

The upper bound of the interval is of:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.646 + 1.645\sqrt{\frac{0.646(0.354)}{65}} = 0.744[/tex]

For seniors, the parameters are given as follows:

[tex]n = 52, \pi = \frac{34}{52} = 0.654[/tex]

Then the lower bound of the interval is of:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.654 - 1.645\sqrt{\frac{0.654(0.346)}{52}} = 0.545[/tex]

The upper bound of the interval is of:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.654 + 1.645\sqrt{\frac{0.654(0.346)}{52}} = 0.762[/tex]

The intervals overlap, hence there is not enough evidence to conclude that there is a difference.

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the different collections than many (40+4-1)! / (40!)(43-40)!  -  (20+4-1)! / (20!)(23-20)!.

What is combination?

A combination is a choice made in mathematics from a group of different elements when the order of the choices is irrelevant (unlike permutations). For instance, if three fruits, such as an apple, an orange, and a pear, are supplied, there are three possible pairings of the two: an apple and a pear. Formally speaking, a k-combination of a set S is a subset of S's k unique components. In other words, two combinations are the same if and only if they have the same members. (It is not important how the individuals in each set are arranged.) The quantity of k-combinations for a set with n components

if the pile contains only 20 quarters but at least 40 of each other kind of coin,

So the P (n k ) = (20+4-1)! / (20!)(23-20)! subtracted from (40+4-1)! / (40!)(43-40)!

Hence the different collections than many (40+4-1)! / (40!)(43-40)!  -  (20+4-1)! / (20!)(23-20)!

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Step-by-step explanation:

rearrange the equation so that the unknown you are r trying to calculate is on its own on one side of the equation

The distance covered by a car in one hour is 36.15 miles, and the distance covered by a car using 1 gallon of fuel is 12.05 miles.

A thing that moves quickly and with high speed, covering a lot of ground in a short time. On the other hand, a slow-moving object traveling at a low speed covers a comparatively small distance in the same amount of time. An object with zero speed does not move at all.

Given:

A car traveled at a constant speed for 4 hours and covered 144.6 miles,

The fuel used = 12 gallons,

Calculate the distance covered in 1 hour as shown below,

The distance covered in 1 hour = 144.6 / 4

The distance covered in 1 hour = 36.15 miles

Calculate the distance traveled using 1 gallon of fuel,

The distance traveled using 1 gallon of fuel = 144.6 / 12

The distance traveled using 1 gallon of fuel = 12.05 miles.

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No, the slopes are not perpendicular. The slope of 3 is three times larger than the slope of 1/-3, so the two slopes form an angle that is less than 90 degrees.

1. The slope of a line is the ratio of the vertical change to the horizontal change in the line, this is also known as the rise over run.

2. The slope of the first line is 1/-3 and the slope of the second line is 3.

3. To determine if the two slopes are perpendicular, we need to calculate the angle between them.

4. The angle between two slopes is equal to the arctan(slope1/slope2).

5. Using the formula, we can calculate the angle between the two slopes to be 63.43 degrees.

6. Since this angle is less than 90 degrees, the two slopes are not perpendicular.

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The maximum volume of the box in terms of A will be √3A/4 -3√3/4 cu cm.

It is given that the box has an open top and a square base.

This implies length = breadth.

Let them be x cm

Now, the area of the box is A sq cm

This means

lb + 2bh + 2lh = A

or, x² + 2xh + 2xh = A

or, 4xh + x² = A

or, h = A/4x - x/4

Now volume (V) = lbh

= x²(A/4x - x/4)

= Ax/4 - x³/4

Now to maximize volume we will first differentiate with respect to x and equate it to zero. Hence we get

V' =0

or, A/4 - 3x²/4 = 0

or 3x²/4 = A/4

or, x² = 3

or, x = √3

Now t check whether this gives us the maximum volume we will calculate V"(√3)

V" = -3x/2

V"(√3) = -3√3/2

Since V"(√3) is negative we will get maximum value for x = √3

Now the volume is

A√3/4 - (√3)³/4

= √3A/4 -3√3/4 cu cm

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The missing angles in the triangle is as follows:

A triangle is a polygon with three sides. The sum of angles in a triangle is 180 degrees.

∠3 = 55 degrees (vertically opposite angles)

Vertically opposite angles are congruent to each other.

The exterior angle theorem states that the measure of an exterior angle is equal to the sum of the measures of the two remote interior angles of the triangle.

Using exterior angle theorem ,

105 = ∠5 + 55

∠5 = 105 - 55

∠5 = 50 degrees

∠4 = 180 - 50 - 55

∠4 = 75 degrees

Therefore, the other triangle is an isosceles triangle. This means the base angles are equal.

Hence,

∠1  = ∠2 = x

2x + 55 = 180

2x = 180 - 55

2x = 125

x = 125 / 2

x = 62.5 degrees.

Hence,

∠1  = ∠2 = 62.5 degrees.

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Based on the margin of error, an estimate of the total number of feral cat complaints for planet Purple is A. Between 1018.5 and 1361.5 complaints.

The margin of error shows the statistical difference between the actual and projected or estimated results.

The margin of error gives the difference between the upper limit and the lower limit of the sample estimate.

With the margin of error, one establishes a level of confidence or the confidence interval in the sample results.

The total number of cities on planet Purple = 4,500

Random sample size = 350 cities

Average complaints = 3.4

Margin or error = ± 0.49

Upper limit = 1,361.5 [350 x (3.4 + 0.49)]

Lower limit = 1,081.5 [350 x (3.4 - 0.49)]

Thus, using the margin of error, an estimate of feral cat complaints hovers over Option A.

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From the information given, Ashley's age is 27

how to calculate the value:

Let the four siblings' ages be;

Ashley's age is x, x + 1, x + 2, x + 3.

If their combined ages equal 100

We possess

x + x + 1 + x + 2 + x + 3 = 100

assemble similar terms

4x + 6 = 100

4x = 100 - 6

4x = 96

Set the topic to "x"

x = 96/ 4

x = 24

But Ashely is x + 3 = 24 + 3 = 27 years old.

Thus, Ashley's age is 27

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the actual area of the bedroom is 324 square feet

What is square?

Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognised by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.

Given the square bedroom have 3 feet side

The area of the bedroom is = 3² = 9 sq inch

1/2 inch = 3 feet

1 inch = 6 feet

1 square inch = 36 square feet

9 square inch = 36*9 = 324square feet

Hence the actual area of the bedroom is 324 square feet

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So the probability that the car will die between 25000 and 30000 miles is   P(X > 25000) = 0.286

Probability is a branch of mathematics that deals with numerical descriptions of the likelihood that an event will occur or that a statement is true. The probability of an event is a number between 0 and 1, where, generally speaking, 0 indicates the event's impossibility and 1 indicates its certainty.

Here,

Exponential distribution is memory less.

Let  be the event of car number of miles car travels before dying out.

So mean

m = 20000

Now P(X > t)  = [tex]e^{\frac{-t}{m} }[/tex]

Since P( X > [tex]\frac{(x+y)}{X > x}[/tex]) = P(X > y)

=> P(X > 25000) = [tex]e^{\frac{-25000}{20000} }[/tex]

=> P(X > 25000) = [tex]e^{\frac{-5}{4} }[/tex]

=>  P(X > 25000) = 0.286

So the probability that the car will die between 25000 and 30000 miles is   P(X > 25000) = 0.286

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Answer:

86

Step-by-step explanation:

The value of x is 10°.

What is triangle?

A polygon with three edges and three vertices is called a triangle. It is one of the fundamental geometric shapes. Triangle ABC is the designation for a triangle with vertices A, B, and C. In Euclidean geometry, any three points that are not collinear produce a distinct triangle and a distinct plane.

Given:

In ΔRST, m ∠R = (5x+15), m ∠S = (6x+8), m ∠T = (4x+7)

Since the addition of three angles of triangle is 180 degrees.

So,

          m ∠R + m ∠S + m ∠T = 180°

(5x + 15) + (6x + 8) + (4x + 7) = 180°

                               15x + 30 = 180°

                                       15x = 180° - 30°

                                       15x = 150°

                                           x = 10°

Hence, the value of x is 10°.

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Answer:

Splitting is where numbers in an equation are broken apart to make it easier to calculate.

Step-by-step explanation:

Splitting is where numbers in an equation are broken apart to make it easier to calculate. Ex:

21 * 7

20 * 7 + 1 * 7 =

140 + 7

147

Answer: 0.48 m,  480 mm

Step-by-step explanation:

1 m = 100 cm

So take 48 divided by 100 = 0.48m, so this is correct.

1 cm = 10 mm

So take 48 times 10 = 480 mm, so this is correct

Answer:

An=144(3/4)1-n

Step-by-step explanation:

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Answer:(1x2)+(4divided by 2)

Step-by-step explanation:

The equation of the line is y - 1 = -1/4( x + 5/4).

Here we have to find the equation of the line.

Data given:

Point on the line= (-5/4, 1)

slope(m) = -1/4

The formula of the equation of the line:

y - y1 = m(x - x1)

where m = slope of the line

(x1, y1) = point on the line

Now putting the values in the equation we have:

y - 1 = -1/4( x- (-5/4))

y - 1 = -1/4( x + 5/4)

Therefore the equation of the line is y-1 = -1/4( x + 5/4).

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Step-by-step explanation:

If the iPod has many thousands of songs, it's safe to assume that the number of 80s songs, songs picked by one of the kids, and songs that you like are all significant. Therefore, the probabilities that the first song will be an 80s song, a song picked by one of the kids, or not one of your songs are roughly equal to the percentage of each type of song on the iPod.

For example, the probability that the first song will be an 80s song is roughly 15%, since only 15% of the songs on the iPod are 80s songs (80s songs make up 100% - 60% - 25% = 15% of the iPod's music). Similarly, the probability that the first song will be a song picked by one of the kids is roughly 25%, and the probability that the first song will not be one of your songs is roughly 40% (100% - 60% = 40%).

Note that these probabilities are only approximate, since the songs on the iPod are chosen randomly and the actual probabilities may vary slightly.

it is 31. i hope this helped you!

Answer:59

Step-by-step explanation:

The system of equations - 2x + 5y = - 2 and 4x - 10y = 4 has infinitely many solutions.

Graphical solutions of a system of equations are way of finding the intersection points of all the equations given.

A system with two or more than two equations has a solution only when they have a common intersection point.

Given, A system of equations - 2x + 5y = - 2...(i) and 4x - 10y = 4...(ii).

Now, multiplying eqn(i) by 2 it becomes - 4x + 10y = - 4...(iii).

Now, by Adding (ii) and (iii) we get,

0x + 0y = 0.

So, 0 = 0, and hence these are coinciding lines with infinitely many solutions.

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Answer:

Step-by-step explanation:

1/5y+3/20

plug in 1/4 for y

1/5(1/4)+3/20

1/20+3/20

4/20

1/5

Answer: he gives them 2 balls each and there are 2 balls remaining

Step-by-step explanation: 10 balls divided by 4 teams would be 2.5 though you cannot split a ball in half therefore you would just keep the two spare balls

get trolled

Step-by-step explanation:

troll people make them get trolled

Answer:

Step-by-step explanation:

to round a decimal, well it depends if it asks you to round to tenths, thousandths or hundredths sometimes even cents..

If you were to be given 5.5567 and it says to round to the hundredth place then you would look at the two points so 5. 55 and then look at the number beside it which is 6 and because 6 is bigger it would round up so you'd get 5.56 hopefully you understood that even if it's just a little..

The comparison of the expressions 4 and fraction 8 over 4 is that they are not equal

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

4 and fraction 8 over 4

Rewrite the above expression using mathematical operators and mathematical symbols

So, we have the following representation

4 and 8/4

The above expression are integers and fraction expressions

So, we express 8/4 as an integer

This gives

4 and 2

The number 2 is less than the number 4

This means that both numbers are not equal

Hence, the conclusion is not equal

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Answer: 36 miles

Step-by-step explanation:

2/3 hour = 40 minutes

We know that its speed is 24 miles in 40 minutes

So take 24 divided by 40 = 0.6 miles per minute

Then take 0.6 times 60 = 36 miles in 1 hour

So it can drives 36 miles in 1 hour

Answer: f(5)=9.5

Step-by-step explanation:

If the graph displays f(x)=(-1/2)x+12, then the answer for f(5) would be 9.5.

However, if the graph/line varies from this, (and is not just a straight line or y=mx+b,) the answer will be different as well.

Given the information you gave me though, this is the best I can do. Please check the given graph/equation before inputting the above answer.