jacob is an american, has been a smoker since he was 21, and is now 48 years old. if he continues to smoke, his smoking habit might shorten his life expectancy by an average of how many years?

Answer:

30x-18

Step-by-step explanation:

The average sample of 10 plantings tree-planting time is two hours- P-value = 0.251453

The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project-P-value = 0.251453

We are unable to reject the null hypothesis and accept it because the p value is higher than the significance level.

As a result, we draw the conclusion that the average tree-planting time is two hours.

Hypothesis:

In statistics, hypothesis testing is used to identify the variance in the group of data that results from genuine variation. Based on the presumptions, the sample data are taken from the population parameter. The hypothesis can be divided into many categories. A hypothesis is described in statistics as a formal statement that explains the relationship between two or more variables belonging to the specified population. It aids the researcher in converting the stated issue into an understandable justification for the study's findings. It provides examples of various experimental designs and guides the investigation of the research procedure.

To learn more about hypothesis visit: brainly.com/question/29519577

#SPJ4

Creation of class to calculate the areas of different geometrical shapes requires to use certain rules which are mentioned in detail here.

Developers frequently encounter naming issues. I lost count of the number of hours I've spent considering what to name things and the amount of time it took me to decipher code that had inappropriate names. Whether it was an object, methods, class, or something else is irrelevant. Given that we spend more time reading code than developing it, effective naming is usually beneficial in the long run.

Your code becomes better and cleaner when you use excellent names. It aids in helping you recognize the functions of each piece of code intuitively. It makes your application easier to read in the future by other developers as well as yourself.

To learn more about naming a class, visit:

brainly.com/question/6859172

#SPJ4

A(n) IQ test evaluates a child's performance in relation to other kids in terms of how well they can perform specific activities at a specific time.

Each individual IQ exam is made up of a number of smaller questions, and no reading nor writing are required. Some verbal subtests consist of spoken questions with no set time restriction. Other subtests are frequently timed and typically have a visual or spatial focus. It takes one to two hours to give the exam.

115 to 129: Superior or intelligent. 130 through 144: Fairly talented. From 145 through 159: Very talented. Exceptionally talented from 160 to 179.

Learn more about IQ at

https://brainly.com/question/10050331?referrer=searchResults

#SPJ4

Based on the information provided, it can be determined that there are 120 steps visible on the escalator at any given time.

Assume that there are x total steps, e for the escalator speed, and b for Bob's pace.

Bob noticed 75 stairs and climbed the entire escalator in the time it took him to ascend it. As a result, the escalator must have added an extra x + 75 steps.

Let e and b be the speeds of the escalator and Bob, respectively.

Alice took 150 steps at a speed of (3b-e) step rate as she descended the stairs.

Bob took 75 steps at a speed of (b+e) each step as he ascended.

Since, Al and Bob were walking the same distance at a time , we have,

150(3b-e) = 75(b+e)  

Solving  these two equation we get ,  e/b = 3/5

Thus while Bob took 75 steps to go up, the escalator contributed an extra

3/5 * 75 = 45 steps

Finally, there is a total of 75+45=120 steps in the length of the escalator.

To learn more about escalator problems

https://brainly.com/question/4681828?

#SPJ4

There were 50 pounds of strawberries and 23 pounds of blueberries sold by Keilantra.

Given,

The cost of 1 pound of strawberry = 2.25

The cost of 1 pound of blueberry = 4

Total cost made by Keilantra = 204.50

The quantity of strawberry sold = x

The quantity of blueberry sold = y

Total quantity of berries sold = 73 pounds

We have to find the quantity of strawberries and blueberries sold:

Here,

2.25x + 4y = 204.50 and x + y = 73

Then,

x + y = 73

x = 73 - y

Substitute this in; 2.25x + 4y = 204.50

That is,

2.25 × (73 - y) + 4y = 204.50

(2.25 x 73) - 2.25y + 4y = 204.50

164.25 + 1.75y = 204.50

1.75y = 204.50 - 164.25

y = 40.25/1.75

y = 23

Then,

x + 23 = 73

x = 73 - 23 = 50

Therefore The quantity of strawberries and blueberries sold by Keilantra is 50 pounds and 23 pounds.

Learn more about quantity here:

brainly.com/question/14698851

#SPJ4

Answer:

To get the correct answer.If it isnt followed you will get a number/answer but that is incorrect

The total number of tickets sold in the year 2018 was 113,200.

For the stated question-

Total tickets sold in 2019 = 105,276

Let the tickets sole in 2018 be 'x'.

Then, percentage decrease in the year 2019 be-

x - 7% of x = 105,276

x - 7x/100 = 105,276

93x/100 = 105,276

x = 105,276 x 100 / 93

x = 113,200

Thus, the total number of tickets sold in the year 2018 was 113,200.

To know more about the percentage decrease, here

https://brainly.com/question/13631568

#SPJ4

The graphs for the given systems of linear equations are shown below.

From the graph, the solution to the first system is (8, -5)

From the graph, the solution to the second system is (-7, -6)

From the question, we are to graph the given system of equations

The given system of equations is

y = 1/4x - 7

y = -1/2x - 1

First, we will plot the graph by using the x-intercepts and the y-intercepts of  the lines

y = 1/4x - 7

Set y = 0 to determine the x-intercept

0 = 1/4x - 7

7 = 1/4x

x = 28

The x-intercept of the equation is 28

Set x = 0 to determine the y-intercept

y = 1/4(0) - 7

y = 0 - 7

y = -7

The y-intercept of the equation is -7

For y = -1/2x - 1

Set y = 0 to determine the x-intercept

0 = -1/2x - 1

1 = -1/2x

-x = 2

x = -2

The x-intercept of the equation is -2

Set x = 0 to determine the y-intercept

y = -1/2(0) - 1

y = 0 - 1

y = -1

The y-intercept of the equation is -1

Using the x-intercepts and y-intercepts, the graph of the system is shown below

For the second system of equations

y = 1/7x - 5

y = 8/7x + 2

For y = 1/7x - 5

Set y = 0 to determine the x-intercept

0 = 1/7x - 5

5 = 1/7x

x = 35

The x-intercept of the equation is 35

Set x = 0 to determine the y-intercept

y = 1/7(0) - 5

y = 0 - 5

y = -5

The y-intercept of the equation is -5

For y = 8/7x + 2

Set y = 0 to determine the x-intercept

0 = 8/7x + 2

-2 = 8/7x

8x = -14

x = -14/8

x = -7/4

The x-intercept of the equation is -7/4

Set x = 0 to determine the y-intercept

y = 8/7(0) + 2

y = 0 + 2

y = 2

The y-intercept of the equation is 2

Using the x-intercepts and y-intercepts, the graph of the system is shown below

Learn more on Graphing system of linear equations here: https://brainly.com/question/14323743

#SPJ1

The variance over an interval for a uniform distribution is

V(X) = ( b - a )²/ 12

Here,

a and b are intervals .

By the definition of the variance, V(X) = E[X2] − (EX)2.

On solving ,

V(X)

=(a²+ab+b²)/3−(a²+2ab+b²)/4

=(a²−2ab+b²)/12

=( b - a )²/ 12

A continuous probability distribution is a Uniform distribution and is related to the events which are equally likely to occur. It is defined by two parameters, x and y, where x = minimum value and y = maximum value. It is generally denoted by u(x, y).

A two-parameter family of curves known as the uniform distribution (sometimes known as the rectangle distribution) is famous for having a constant probability distribution function (pdf) between its two bounding parameters.

For values tabulated to a specific number of decimal places, this distribution is suitable for illustrating the distribution of round-off mistakes. Techniques for generating random numbers , like the inversion method, use the uniform distribution.

To learn more about distributions

https://brainly.com/question/17512183

#SPJ4

The slope of line C = 40t+150 will be 40.

What is equation straight line?

Y = mx + c is the general equation for a straight line, where m denotes the line's slope and c the y-intercept. It is the version of the equation for a straight line that is used most frequently in geometry. There are numerous ways to express the equation of a straight line, including point-slope form, slope-intercept form, general form, standard form, etc. A straight line is a geometric object with two dimensions and infinite lengths at both ends. The formulas for the equation of a straight line that are most frequently employed are y = mx + c and axe + by = c. Other versions include point-slope, slope-intercept, standard, general, and others.

The total cost of the gym membership over tt months is given by the equation C=40t+150

The slope of the given equation will be the append of t which is 40.

Hence, the question indicates that the starting value is 150 already without eve before the time stated.

Learn more about straight line, by the following link

https://brainly.com/question/16949303

#SPJ1

Answer:

Step-by-step explanation:

2.66 as a fraction in simplest form

(2.66 × 100)/100 =

266/100 =

133/50

-----------------

check

133 : 50 = 2.66

the answer is good

The small town would take up 5 years to double the population from 500 people.

As its sign is "%," the word "percent" implies "for every hundred". Since it is read as a percentage, "x%" should be read as "x percent." So, a percent is a fraction with a denominator of 100. 30%, for instance, equals 30/100 (i.e. 30 parts from 100). You can also write this as 0.30.

Population of small town = 500

Population Growth rate = 15 %

To find :

              Time when the population is doubled.

We will use successive change

500 People after 1 year = 575

575 People after 1 year = 661.25

661.25 People after 1 year = 760.4375

760.4375 People after 1 year = 874.503125

874.503125 People after 1 year = 1005.67859

Hence it will total take the time of 5 years to double the population.

To learn more about Percentage, visit:

https://brainly.com/question/29306119

#SPJ4

Answer:

(x + 1 ) (2x-9)

Step-by-step explanation:

Break The expression into groups

= ([tex]2x^{2} +2x)+(-9x-9)[/tex]

Factor out 2x from [tex]2x^{2}[/tex] + 2x: 2x (x + 1)

and then you want to factor out the -9x - 9 -9( x + 1 )

and that equals 2x( x + 1 ) [tex]-9(x+1)[/tex]

And now do it again Factor out common term x + 1

and now it " Equals" [tex](x + 1)(2x-9)[/tex]

If the perimeter of the rectangle is 4646 centimeters and its length is 88 centimeters then its width would be 2235 centimeters

The perimeter of a form in geometry is defined as the entire length of its border. A shape's circumference is calculated by summing the lengths of all of its sides and edges. Its dimensions are expressed in linear units like centimeters, meters, inches, and feet.

In daily life, people constantly employ the idea of perimeter. For instance, we measure the perimeter of the area to be fenced in or decorated for Christmas to determine how much wire you will need.

We are aware that a regular polygon has equal-length sides.

A regular polygon's perimeter is equal to the product of all of its sides, which is equal to the quantity o sides times the length of a side.

How to solve?

width = 4646 - 2*88 =4470

width of one side = 4470/2 = 2235 centimeters

To learn more about Perimeter, visit:

https://brainly.com/question/6465134

#SPJ4

Answer: $225

Step-by-step explanation: .25 x 900 = 225

Answer: $225

Step-by-step explanation:

You earn $.25 for every quart picked. You pick 900 quarts. take 900 and times it by .25. You get 225 so you earn $225

The confidence interval for the true percent of car owners in the city  who received a speeding ticket be, (139.27 , 160.73).

Subtract 1 from your sample size. 1000 – 1 = 999. This provides the degrees of freedom.

Subtract the confidence level from 1, and then divide by two.

(1 – .95) / 2 = .025

Now, df = 999 and α = 0.025

from the table at df = 999 we got 2.262.

Divide your sample standard deviation by the square root of your sample size.

150 / √(10) = 4.74

Now, 2.262 × 4.74 = 10.73

So, the confidence interval be,

(150 - 10.73 , 150 + 10.73) = (139.27 , 160.73)

Hence, the confidence interval for the true percent of car owners in the city  who received a speeding ticket be, (139.27 , 160.73).

Learn more about Statistics here https://brainly.com/question/27165606

#SPJ4

When building a regression model provided the given information from the four remaining independent variables the variable to be entered next (second) would be variable with the highest coefficient of partial determination. (Option A)

A regression model refers to a function that illustrates the relationship between one or more independent variables and a response, target, dependent variable. The primary uses of regression analysis are forecasting, time series modeling and identifying the cause-and-effect relationship between variables. When building a regression model with five potential independent variables to explain the variation in the dependent variable, at step 1, variable x3 enters the regression model. Of the four remaining independent variables, the variable entered next into the model would be the variable with the highest coefficient of partial determination. A coefficient of partial determination refers to the measurement of marginal (extra) contribution of X variable or percentage of variation in the response variable that can be explained by the explanatory variables and can be used to measure how strongly two variables are related to one another.

Learn more about Regression model:

https://brainly.com/question/17844286

#SPJ4

Distance = 50 meters

Slowest means, longest time =58 seconds

Speed is equal to distance divided by time:

Speed = 50/58

=25/29 m/s

=0.86m/s which is the answer.

Linda kept track of her times in the 50-meter freestyle at her team's swim meets. Swim times (sec.) H 40 44 48 52 56 60 What was Linda's slowest time in the 50-meter freestyle? 60 seconds 52 seconds 56 seconds 58 seconds

To know more about solutions,click below

https://brainly.com/question/3951473

Check the picture below.

[tex]\textit{Circumference of a circle}\\\\ C=2\pi r ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=1.57 \end{cases}\implies 1.57=2\pi r\implies \cfrac{1.57}{2\pi }=r\implies {\Large \begin{array}{llll} \stackrel{meters}{0.25}\approx r \end{array}}[/tex]

The required are of shaded region for the given question is 20.7 cm^2.

A circle is partitioned into two areas, specifically the significant area, and the minor area. A bigger piece of the circle involved by the radii and the significant circular segment is supposed to be a significant area. A more modest part involved by two radii and a minor circular segment is known as the minor area.

We have,

∠BOC = 2π/5, radius = 6 cm, OA = 2 cm, DC = 2 cm

OD = 6 - 2 = 4 cm,

We know that

Area of triangle = OA×OD×sin(2π/5)/2

A = 2×4×0.475/2 = 1.9 sq. cm

And

Area of sector = (π/5)/2π ×πr^2

Area of sector = π(6)^2/5

Area of sector = 22.6  sq. cm

Area of shaded region = 22.6 - 1.9 = 20.7  sq. cm

To know more about area of sector visit:

brainly.com/question/7512468

#SPJ1

Answer:yes

Step-by-step explanation: 2/8=4

4/1=4 since both of them equal 4 they are equivalent

Answer:

29

Step-by-step explanation:

(14+8²︎) ÷ 2 - 10

(14+64) ÷ 2 - 10

(78) ÷ 2 - 10

39 - 10

29

Could you please mark me brainliest for this? Thank you!

Answer:

Step-by-step explanation:

The easiest way to do this is to clear the decimal by multiplying the numerator and the denominator by

10

.

You can reduce the fraction later.

40

m

48

m

2) Reduce the fraction to its simplest form

Cancel out

8

from the top and the bottom

5

m

6

m

←

answer

This answer means that the numerator and denominator of the given fraction

4

m

4.8

m

are in a

5

:

6

ratio relationship with each other.

Check

Is

4

4.8

equal to

5

6

?

Cross multiply

(

4

)

(

6

)

should be equal to

(

5

)

(

4.8

)

24

is equal to

24.0

C

h

e

c

k

Answer:

25

Step-by-step explanation:

knowing that 80 is 4/5 of 100, we need to find the number that is 5/4 of 20. That number is 25. This can be proven by calculating that 20/25 and 80/100 both can be simplified to 4/5.

Answer:

The difference between factoring x4+9x2+8 and factoring x2+9x+8 is that the first equation is a fourth degree polynomial, while the second equation is a second degree polynomial. The first equation can be factored into (x2 + 3)(x2 + 8), while the second equation can be factored into (x + 8)(x + 1).

The squares cut from the corners should be large in width and length 6 to hold the box as much as possible. The dimensions of the box with the largest volume are 6 x 6.

If the squares cut from the corners are h × h inches

The open-top box will have

A height of h

A width of 12 - 2h

and a length of 12 - 2h

So its volume will be

V(h) = h × (12 - 2h) × (12 - 2h)

= 4h³ - 48h² + 144h    (square inches)

dV/dh= 12h² - 96h + 144

Critical points occur when the derivative (dV/dh) is zero.

12h² - 96h + 144 = 0

h² - 8h + 12 = 0

(h − 2)(h − 6) = 0

It is clear that h = 6 is not the crucial point for the maximum as it would produce widths and lengths of zero (and so a volume of zero).

In order to cut out squares measuring 6 × 6 inches from the corners of the bigger sheet, the most volume may be obtained.

To learn more about volume

https://brainly.com/question/1578538

#SPJ4

The inequality that represents at least how many minutes it will take to download the whole game

is x ≥ (2.2 - 0.5)/0.01

Inequalities are created through the connection of two expressions. It should be noted that the expressions in an inequality aren't always equal. Inequalities implies that the expressions are not equal. They are denoted by the symbols ≥ < > ≤.

In this scenario, 2.2 GB game is being downloaded onto your laptop and when you have downloaded half a gigabyte, you notice that your computer has been downloading at a rate of .01GB/min.

The inequality will be illustrated. Let the number of minutes be x.

x ≥ (2.2 - 0.5)/0.01

This illustrates the inequality.

Learn more about inequalities on:

brainly.com/question/25275758

#SPJ1

Answer:

First line:  First box:1  Second box: 5

Second line: First box: 20 Second box: 15  Third box: 5

Step-by-step explanation:

This is two ways to do the same problem.  

5(4-3)  The first problem.  We are subtracting the numbers in the parentheses and then multiplying that by 5

5(1) = 5

The second way to solve this is by using the distributive property.  We are multiplying 5 by both numbers in the parentheses and then subtracting those two numbers

5(4-3)

5(4) - 5(3)

20 - 15

5