Using the sample​ statistics, construct a 9999​% confidence interval estimate of the mean body temperature of all healthy humans. do the confidence interval limits contain 98.6degrees°​f? what does the sample suggest about the use of 98.6degrees°f as the mean body​ temperature?

Answers

Answer 1
Given that a data set includes 105 body temperatures of healthy adult humans for which [tex]\bar{x}=98.7^oF[/tex] and [tex]s=0.64^oF[/tex].


Part A:

What is the best point estimate of the mean body temperature of all healthy humans?

The sample mean is the point estimate of the population mean.

Given that the sample mean is 98.7 degrees F, therefore, the best point estimate is 98.7 degrees F.



Part B:

Using the sample statistics, construct a 99% confidence interval estimate of the mean body temperature of all healthy humans.

Since the sample size is large, we can assume that the population is approximately normal.

The 99% confidence interval of a data set with sample mean [tex]\bar{x}=98.7[/tex] and sample standard deviation, s = 0.64 and degree of freedom = 105 - 1 = 104 is given by:

[tex]C.I.=\bar{x}\pm1.665\left( \frac{s}{\sqrt{n}} \right) \\ \\ =98.7\pm1.665\left( \frac{0.64}{\sqrt{105}} \right) \\ \\ =98.7\pm1.665(0.0625) \\ \\ =98.7\pm0.104=\bold{(98.596, \ 98.804)}[/tex]

It can be seen from above that the confidence interval is between 98.596 and 98.804 which contains 98.6 degrees F.

This suggests that the mean body temperature could very possibly be 98.6 degrees F.

Related Questions

to construct the midpoint of a segment, fold the paper so that the given line segment lies on itself and

Answers

And the endpoints lie on each other.

Answer:

The endpoints of the line segment lie on each other

Explanation

To understand the question, follow the practical steps below

1. Take a sheet of plane paper

2. Label the edges of the top of the paper A and B

3. Fold the paper in such a way that edge A lies on B.

You'll notice the following;

1. The top of the paper lies in itself; hence, we can say that the line segment lies on itself

2. You have a new line at the centre of the paper. The point at the top of this center line is the midpoint of the line segment

3. The edges that lie on each other translates to the endpoints lying on each other.

Number (3) above is the required observation and the right answer.

The leukemia and lymphoma society sponsors a 5k race to raise money it receives $55 per race entry and $10000 in donations but it must spend $15 per race entry to cover the cost of the race write and solve an inequality to determine the number of race entries the charity needs to raise at least 55,000

Answers

n >= 1125 First, make an equation to express the money raised after expenses. 55n - 15n + 10000 = m The above expression can be read as "55 dollars per running is raised, but 15 dollars is spent per running to support them. Plus we get 10000 as a constant regardless of how many runner we have." Now convert that to an inequality for at least 55000 to be raised. 55n - 15n + 10000 >= 55000 Now solve for n 55n - 15n + 10000 >= 55000 40n + 10000 >= 55000 40n >= 45000 n >= 1125 So there needs to be at least 1125 runners in order to meet the goal of $55,000.

Based on a​ poll, 5050​% of adults believe in reincarnation. assume that 44 adults are randomly​ selected, and find the indicated probability. complete parts​ (a) through​ (d) below.
a. what is the probability that exactly 33 of the selected adults believe in​ reincarnation? the probability that exactly 33 of the 44 adults believe in reincarnation is

Answers

To solve this problem, we use the formula for binomial probability:

P = [n! / (n – r)! r!] p^r * q^(n – r)

where,

n = total number of adults = 4

r = number of adults who believe in reincarnation = 3

p = chance of believing in reincarnation = 50% = 0.50

q = 1 – p = 0.50

 

P = [4! / (4 – 3)! 3!] 0.50^3 * 0.50^(4 – 3)

P = 0.25 = 25%

Answer:

Answer is 0.096

Step-by-step explanation:

Here 44 adults are randomly selected.

Each adult selected is independent of the other to believe in reincarnation.

Also there are only two outcomes, probability for success in each trial = 0.50

Hence X no of adults who believe in reincarnation is binomial with n =50 and p = 0.50

[tex]a) P(X=23) = 50C23 (0.5)^{50} =0.096[/tex]

Working notes:

50C23 =108043253365600

0.5^50) = 8.8178x10^(-14)

Simplifying we get answer as 0.096

What’s the best answer

Answers

a is your best answer

a should be the one dude trlolololl

Which list contains ONLY rational numbers?

Answers

The answer is C.  1/7, 9, 2 Hoped this helped 
Feel free to ask anymore questions at branily.com 

Answer:

B. [tex]0.4166\overline{6}[/tex], [tex]\sqrt{81}[/tex], [tex]\frac{1}{8}[/tex].

Step-by-step explanation:

We are asked to find the list that contains only rational numbers.

We know that a number is known as rational, when it can be expressed as a fraction.

Upon looking at our given choices, we can see that option B is the correct choice.

In [tex]0.4166\overline{6}[/tex], the digit 6 has a bar on it, this means that it is repeating. We know that a repeating decimal is a rational number.

[tex]\sqrt{81}=9[/tex]. We can represent 9 as a fraction: [tex]\frac{9}{1}[/tex].

[tex]\frac{1}{8}[/tex] is already written as a fraction, therefore, it is a rational number.

What is the area of △ABC?

Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth.

Answers

So area (a) = 1/2 (base)(height) = 1/2bh
We have the b at 25m, but to find the h we need to drop an altitude or apothem down that is perpendicular to the base (90°). Now we have to do some trig to determine that h.
Since we're given that AB is 40m, and <B is 80°, we can set up a SOH-CAH-TOA equation:
The hypotenuse = 40m, and our height is opposite <B, therefore sin (80) = h/40,
h = 40 × sin (80) = 40 × 0.985 = 39.39m
Now, a = 1/2bh = 1/2 (25m)(39.4m)
[tex]a \: = 492.40 \: {m}^{2} [/tex]

Answer: smh

Step-by-step explanation:

Which soap dispenser shows that 64% of its soap has been used?

Answers

Dispenser C is your answer

16/25 x 4/4 = 64/100

64/100 = 0.64, or 64% 

Your answer is Dispenser C

hope this helps
dispenser c shows 64% has been used

THE TOTAL COST OF A SUIT AND 4 TIES IS $292. THE SUIT COST $200. eACH TIE COST THE SAME AMOUNT. fIND THE COST OF ONE TIE

Answers

a suit and 4 ties = 292
a suit = 200

4 ties = 292 - 200
4 ties = 92
4T = 92

4T/4 = 92/4

T = 23

Each tie costs 23 dollars

hope this helps
okay so with buying a suit and a 4 does for $292.
292-200=92
92÷4=23
23×4=92
so one tie would equal $23 dollars
hope this helps!

in what quadrant does the angle 11 pi / 4 terminate?

Answers

check the picture below.
Remember quadrants are numbered counter-clockwise,1 through 4 with Quadrant 1 located in the upper-right corner.

Determine which of the following terms is a function: a. (1,2) (2,4) (3,5) c. (1,2) (2,4) (2,6) b. (1,2) (2,3) (1,5) d. (1,2) (3,5) (3,7)

Answers

in a function, X does not repeat.
Your answer is A.

a (1,2) (2,4) (3,5)
there are different x values for
each point, so this IS A FUNCTION.

b. (1,2) (2,3) (1,5)
there are two values of x being 1,
so this is NOT A FUNCTION.

c. (1,2) (2,4) (2,6) 
there are two values of x being 2
so this is NOT A FUNCTION.

d. (1,2) (3,5) (3,7)there are two values of x being 3,
so this is NOT A FUNCTION.

hope this helps and have a great day!

Answer:

A is the mofluffin answer

Step-by-step explanation:

Yolanda is saving money to buy a game. so far she has saved $30 , which is five-sixths of the total cost of the game. how much does the game cost?

Answers

Final answer:

To find the total cost of the game based on Yolanda's savings of $30, which is five-sixths of the cost, multiply $30 by the reciprocal of 5/6, resulting in a total cost of $36.

Explanation:

The question asks how much a game would cost if Yolanda has already saved $30, which is five-sixths of the total cost of the game. To find the total cost of the game, we consider the amount saved ($30) as five-sixths of the total cost (which we'll call x).

So the equation to solve is 5/6 * x = $30. To find x, we divide $30 by 5/6, which is the same as multiplying $30 by the reciprocal of 5/6 (which is 6/5). Therefore, x = $30 * (6/5) = $36. Thus, the total cost of the game is $36.

(4.5+7.6)-8*2.5 I really need help with this problem

Answers

4.5 + 7.6= 12.1 - 8 x 2.5= 
12.1 - 20 = -7.9
(4.5 + 7.6) - 8 * 2.5
12.1 - 8 * 2.5
12.1 - 20
- 7.9 <===

1.Which statement is true about this argument?

Premises:
If two lines are parallel, then the lines do not intersect.
Lines m and n do not intersect.

Conclusion:
Lines m and n are parallel.

Which statement is true about the argument?

The argument is not valid because the premises are not true.

The argument is valid by the law of syllogism.

The argument is valid by the law of detachment.

The argument is not valid because the conclusion does not follow from the premises.


2.Which statement is true about this argument?

Premises:
If a quadrilateral is a square, then the quadrilateral has four right angles.
Quadrilateral JKLM has four right angles.

Conclusion:
Quadrilateral JKLM is a square.



The argument is not valid because the premises are not true.

The argument is valid by the law of detachment.

The argument is not valid because the conclusion does not follow from the premises.

The argument is valid by the law of syllogism.

Answers

The argument is valid by the law of detachment.

The statements that are true about the arguments in the question are;

1) Option C; Law of detachment

2) Option B; Law of detachment

1) We are given the premise that;

If two lines are parallel, then the lines do not intersect.

This premise is true because we know from parallel and perpendicular lines property that parallel lines never intersect each other.

With that premise, we are now given a conclusion that; Lines m and n do not intersect.

This kind of condition is known as law of detachment which states that;

If x is true, then y is also true.

Thus, Option C is correct

2) We are given the premise that;

If a quadrilateral is a square, then the quadrilateral has four right angles.

The given premise is true because from the definition of a square, all sides must be equal and all angles must be right angles.

We are now given the conclusion that;

Quadrilateral JKLM has four right angles.

This conclusion is valid because it follows the given premise.

Again like in 1 above, this follows the law of detachment.

Option B is correct

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What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?

14.6 units

15.5 units

21.0 units

21.6 units

Answers

see the attached figure to better understand the problem

we know that the distance between two points is equal to

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

Let

[tex]A(-3,3)\ B(3,4))\ C(3,-3)[/tex]  

Step 1

Find the distance AB

[tex]A(-3,3)\ B(3,4)[/tex]  

substitute in the formula

[tex]d=\sqrt{(4-3)^{2}+(3+3)^{2}}[/tex]

[tex]d=\sqrt{(1)^{2}+(6)^{2}}[/tex]

[tex]dAB=\sqrt{37}\ units[/tex]

Step 2

Find the distance BC

[tex]B(3,4))\ C(3,-3)[/tex]  

substitute in the formula

[tex]d=\sqrt{(-3-4)^{2}+(3-3)^{2}}[/tex]

[tex]d=\sqrt{(-7)^{2}+(0)^{2}}[/tex]

[tex]dBC=7\ units[/tex]

Step 3

Find the distance AC

[tex]A(-3,3)\ C(3,-3)[/tex]  

substitute in the formula

[tex]d=\sqrt{(-3-3)^{2}+(3+3)^{2}}[/tex]

[tex]d=\sqrt{(-6)^{2}+(6)^{2}}[/tex]

[tex]dAC=\sqrt{72}\ units[/tex]

Step 4

Find the perimeter of the triangle

we know that

the perimeter of the triangle is the sum of the length sides of the triangle

[tex]P=AB+BC+AC[/tex]

substitute the values

[tex]P=\sqrt{37}\ units+7\ units+\sqrt{72}\ units=21.6\ units[/tex]

therefore

the answer is

the perimeter of the triangle is [tex]21.6\ units[/tex]



You are choosing between two plans at a discount warehouse. Plan A offers an annual membership fee of $120 and you pay 80% of the manufacturer's recommended list price. Plan B offers an annual membership fee of $40 and you pay 90% of the manufacturer's recommended list price. How many dollars of merchandise would you have to purchase in a year to pay the same amount under both plans? What will be the cost for each plan?

Answers

Let $A be the cost of $q of merchandise under plan A and similarly $B under plan B.
A=120+0.80q, B=40+0.90q
When A=B, 120+0.80q=40+0.90q, 80=0.10q, q=80/0.10=$800.
So you would need to buy $800 of merchandise.
A=B=120+640=40+720=$760 for each plan.

An equation is formed when two equal expressions. The number of merchandise that you would have to purchase in a year to pay the same amount under both plans is 800.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Given that you are choosing between two plans at a discount warehouse.

The cost for x number of merchandise under plan A, which offers an annual membership fee of $120 and you pay 80% of the manufacturer's. Therefore, the cost will be,

Cost = 120 + 0.8x

The cost for x number of merchandise under plan B, which offers an annual membership fee of $40 and you pay 90% of the manufacturer's recommended list price. Therefore, the cost will be,

Cost = 40 + 0.9x

Now, in order to find the number of merchandise that you would have to purchase in a year to pay the same amount under both plans, you need to equate the two equations together. Therefore,

Cost from Plan A = Cost from Plan B

120 + 0.8x = 40 + 0.9x

120 - 40 = 0.9x - 0.8x

80 = 0.1x

x = 80 / 0.1

x = 800

Hence, the number of merchandise that you would have to purchase in a year to pay the same amount under both plans is 800.

Further, the cost for each plan for 800 merchandise can be written as,

PlanA,

Cost = 120 + 0.8(800)

        = $760

Plan B,

Cost = 40 + 0.9(800)

        = $760

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Explain the difference between exponential growth and exponential decay

Answers

Exponential growth is the function
[tex]y = a^{x} , a\ \textgreater \ 1[/tex]
Exponential decay is the function
[tex]y = a^{x} , 0\ \textless \ a\ \textless \ 1[/tex]
So, the basic difference is that in growth the base is more than 1, and in decay the base is more than 0 but less than 1.

Final answer:

Exponential growth occurs when a population increases at an increasing rate, whereas exponential decay involves a decrease at a rate proportional to the current size. Logistic growth, adding the concept of carrying capacity, more accurately reflects natural populations with initial exponential increase followed by a plateau as resources become limited.

Explanation:

The key difference between exponential growth and exponential decay lies in the direction and rate at which a quantity changes over time. Exponential growth occurs when a population grows at an increasing rate as time passes, often depicted as a J-shaped curve, whereas exponential decay describes a process of decrease at a rate proportional to the current value, leading to a rapid reduction in size or quantity over time.

In the context of biology and population growth, exponential growth describes how populations can grow dramatically when there are no limits to resources or space. This type of growth can be formalized as a mathematical model where the population after n time periods has increased by a factor of 2n when the base growth rate is 2. In natural populations, this is idealized and does not usually last long as resources become depleted and other limiting factors come into play. On the other hand, exponential decay in biology might refer to the rapid loss of a population due to harsh conditions, lack of resources, or other negative impacts.

What is the reason for each step in the solution of the inequality? −2(x+3)−4>4x+30 Select the reason for each step from the drop-down menus.

Answers

The first blank is Distributive Property.
The second blank is Combine like terms.
The third blank is Addition Property of Order

The reason for each step in the solution of the inequality must be mathematical operations such as;  the distributive property

What is a solution set to inequality or an equation?

If the equation or inequality contains variable terms, then there might be some values of those variables for which that equation or inequality might be true. Such values are called solutions to that equation or inequality.

We have given that -2(x + 3) - 4 > 4x + 30

First, apply the distributive property

-2x - 6 - 4 > 4x + 30

Now combine like terms;

-2x - 10 > 4x + 30

Then subtraction property

-6x - 10 > 30

The addition property

-6x > 40

The division property

x < -20/3

Hence, we get the answer equal to x < -20/3.

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If milk costs​ $1.97 per gallon and a bread recipe uses 6 fl.​ ounces, how much do those 6 fl. ounces​ cost?

Answers

According to the question we can get,
128 ounce milk costs $1.97              (Note:1gallon fluid=128ounce)
6     ounce bread costs=1.97/128 multiples 6
                                       =2.56x10^-3
HOPEFULLLY its works

This graph of a function is a translation of y = 2/x . What is an equation for the function?
A. y = 2/(x - 6) – 3
B. y = 2/(x – 6) + 3
C. y = 2/(x – 3) - 6
D: y = 2/(x – 3) + 6

Answers

Answer: The answer is C, the rest of the answers are  

1:B

2:C

3:A its a graph

4:C y=2/x-3 -6

5:D19, as of 2019


Step-by-step explanation:


Answer:

The correct option is C) [tex]y=\frac{2}{x-3}-6[/tex]

Step-by-step explanation:

Consider the provided information.

Transformation:

The graph of parent function f(x) move up b unit for f(x)+b.

The graph of parent function f(x) move down b unit for f(x)-b.

The graph of parent function f(x) move left b unit for f(x+b).

The graph of parent function f(x) move right b unit for f(x-b).

Since, the graph of the parent function moves down, Therefore Option Option B and D are incorrect.

Here, we can observe that vertical asymptote shifted from x  = 0  to x = 3.

Horizontal Shift: Right  3  Units

Vertical Shift: Down  6  Units

Therefore, the correct option is C) [tex]y=\frac{2}{x-3}-6[/tex]

What is 7,433,654 to the nearest 10,000

Answers

7430000 because the 3 in 430000 is in the ten thousands place and the number in the thousands is less than 5 so you would round down
So the ten thousands in 7,433,654 in this case would be 33,654.

So, you just want to round that to the nearest ten thousand.

(10,000, 20,000, 30,000, 40,000, etc.)

So we want to see which of those 33,654 is closest to.

In this case it would be closest to 30,000, as it is only 3,654 away from it.

And then we can just add it back in the number.

7,430,000 would be your answer.

I need this asap! Please help me!! Brainliest answer! The line plot below represents the frequency distribution of the number of book reports done by students in grades nine and ten. Each x represents 3 students. How many students did less than 4 or more than 17 reports? 

Answers

there are 16 x's combined after counting them. since once x is 3 students your answer would be 48 students.I hope this helps. :D

Debra travels a distance of 2 miles in 1 minute. how much distance can she cover in 25 minutes? choose the correct equivalent rate.

Answers

50 miles over 25 minutes 

Debra traveled 50 miles in 25 minutes at a rate of 2 miles per minute.

What is a unitary method?

A unitary method is a mathematical way of obtaining the value of a single unit and then deriving any no. of given units by multiplying it with the single unit.

Given, Debra travels a distance of 2 miles in 1 minute.

Which is already in unit measure, therefore to determine the distance traveled by Debra in 25 minutes we'll multiply the distance traveled in 1 minute and the total time  Debra traveled.

= (2×25) miles.

= 50 miles.

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Which linear equation has a slope of 3 and a y-intercept of –2?


y = 3x + 2
y = 3x – 2
y = –2x + 3
y = –2x – 3

Answers

the answer to this is y = 3x - 2. 

In the slope-intercept form y=mx+b, b is your y-intercept and in this problem, it will be -2. M is the slope which is 3. 

Answer: y = 3x - 2

Step-by-step explanation:

Equation of a straight line is

y=mx + c

m is the slope and c is the intercept

comparing it with the equation

y=3x - 2

m = slope =3

and c= intercept= -2

In a triangle, two of the angles measure 78o and 56o. What is the measure of the third angle?

Answers

The last angle is 46 degrees! All the angle measures of a triangle add up to 180 degrees.

46o is the answer y0

Margaret is reading a book. the number of pages she has left to read is 276 - 35d, where d represents the number of days she has been reading.

what does each part of the expression represent?

(note - not all options may be used)

a) the number of pages she has read during 1 week
b) the total number of pages in the book
c) the number of pages in the book
d) the number of pages she has read during d days

Answers

a) The number of pages she has read during 1 week is not part of the expression
b)The total number of pages in the book is not given so it is not part of the expression
c) The number of pages in the book is not given so it is not a part of the expression
d)Based on this information Margaret reads at a rate of 35d where d represents the number of days she has been reading. 35 represents the number of pages read per day so 35 times d would give us her rate she reads for the number of days Margaret has been reading.





Answer:

Option b , c and d are the part of the expression .

Step-by-step explanation:

We are given that the number of pages she has left to read is 276 - 35d

d represents the number of days she has been reading.

276 denotes the total number of pages

35 pages denotes the number of pages read per day

35 d represents the number of pages she has read during d days

276 - 35d represents teh reamining pages

So, Option b , c and d are the part of the expression .

You select a card at random from the cards that make up the word replacement. On each card, there is one letter. Without replacing the card, you choose a second card. Find the probability of choosing a vowel and then not a vowel

Answers

In the word replacement, there are 11 letters.

4 of them are vowels : e, a, e, e

7 of them are not vowels : r, p, l, c, m, n, t

The probability of getting a vowel the first try is 4/11.

The probability of getting something that is not a vowel is 7/10. The denominator is one less because the vowel card is not replaced, meaning there is one less card to choose from.

Multiply.
4/11*7/10
=28/110
=14/55

The probability is 14/55.

Hope this helps!

Find the number of hours it would take to drive 510 miles at 55 mph. Round to the nearest tenth of an hour. i THINK ITS 9.3 BUT IM NOT SURE?

Answers

yes, you are correct it is 9.3.

hope this helps.

Answer:   It would take 9.3 hours to take 510 miles.

Step-by-step explanation:  We are given to find the number of hours it would take to drive 510 miles at 55 mph.

We will be using the UNITARY method to solve the given problem.

According to the given information, we have

Number of hours taken to drive 55 miles = 1 hour.

So, number of hours taken to drive 1 mile will be

[tex]\dfrac{1}{55}~\textup{hour}.[/tex]

Therefore, the number of hours it would take to drive 510 miles is given by

[tex]\dfrac{1}{55}\times510=\dfrac{102}{11}=9.27~\textup{hour}.[/tex]

Rounding to nearest tenth of an hour, we get

9.27 hour ≈  9.3 hour.

Thus, it would take 9.3 hours to take 510 miles.

Help me with this question plzzzz

Answers

V = L * W * H
V = 1/4 * 2/3 * 3/5
V = (1 * 2 * 3) / (4 * 3 * 5)
V = 6/60 reduces to 1/10 m^3 <==

South of the White House in Washington, D.C., is the President’s Park South, or the Ellipse, which hosts events such as the White House Garden Tours. The Ellipse is 880 ft from north to south and 1057 ft from east to west. Write an equation in standard form for the Ellipse, centered at the origin.

Note: If any values of a2 or b2 are greater than 1,000, include the comma.

Answers

To answer this, we need to start with the standard equation for an ellipse:
(x^2/a^2)+(y^2/b^2)=1
Where a is one half of one axis, and b is one half of the other.
The problem states that one axis is 1057 ft, and the other is 880 ft, so divide these values by 2 and square them. This results in:
(x^2/279,312.25)+(y^2/193,600)=1
For verification, if you have a graphing calculator, solve for y, set the size of the window so it should perfectly fit the ellipse, and check (it does)
Final answer:

Given the dimensions of the Ellipse, the major axis is the east-west distance (1057 ft) and the minor axis is the north-south distance (880 ft). Taking half these lengths as 'a' and 'b' respectively, the equation of the ellipse in standard form centered at the origin is (x^2/(528.5^2)) + (y^2/(440^2)) = 1.

Explanation:

The given dimensions of the Ellipse represent the lengths of the major and minor axes. In an ellipse centered at the origin, the equation in standard form is given by:

(x^2/a^2) + (y^2/b^2) = 1

where 'a' is half the length of the major axis and 'b' is half the length of the minor axis. Here, since the measurement from east to west (1057 ft) is greater than the measurement from north to south (880 ft), 'a' will have a value of 1057/2 and 'b' will have a value of 880/2. Consequently, the ellipse equation would be:

(x^2/(528.5^2)) + (y^2/(440^2)) = 1

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What is the area of a rectangle with vertices at ​ (−6, 3) ​, ​ (−3, 6) ​ , (1, 2) , and (−2, −1) ?

Enter your answer in the box. Do not round any side lengths.


What is the area of a triangle with vertices at (0, −2) , ​ (8, −2) ​ , and ​ (9, 1) ​ ?

Enter your answer in the box.



What is the perimeter of a polygon with vertices at (−2, 1) , ​ (−2, 4) ​, (2, 7) , ​ (6, 4) ​, and (6, 1) ​?

Enter your answer in the box. Do not round any side lengths.​



What is the perimeter of the rectangle shown on the coordinate plane, to the nearest tenth of a unit?

15.3 units

20.4 units

30.6 units

52.0 units

Answers

(1) the area of a rectangle with vertices at ​ (−6, 3) ​, ​ (−3, 6) ​ , (1, 2) , and (−2, −1)

To find area of rectangle we need to find the length and width

Length = distance between (−6, 3)  and (−2, −1)

Distance = [tex]\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}[/tex]

=  [tex]\sqrt{(-2-(-6))^2 + (-1-3)^2}[/tex]

=  [tex]\sqrt{(4)^2 + (-4)^2}[/tex]=[tex]\sqrt{(16) + 16}[/tex] =[tex]\sqrt{32}[/tex]

width = Distance between (−6, 3) ​, ​ (−3, 6)

Distance = [tex]\sqrt{(-3-(-6))^2 + (6-3)^2}[/tex]

=[tex]\sqrt{3^2+3^2}= \sqrt{18}[/tex]

Area = Length * width = [tex]\sqrt{32} *\sqrt{18} = \sqrt{576}= 24[/tex]

(2)  the area of a triangle with vertices at (0, −2) , ​ (8, −2) ​ , and ​ (9, 1) ​

Area of triangle = [tex]\frac{1}{2} * base * height[/tex]

base  is the distance between (0,-2) and (8,-2)

Distance =  [tex]\sqrt{(8-0)^2 + (-2-(-2))^2}[/tex] = 8

To find out height we take two vertices (8,-2) and (9,1)

Height is the change in y values = 1- (-2) = 3

base = 8  and height = 3

So area of triangle = [tex]\frac{1}{2} * 8 * 3 = 12[/tex]

(3) the perimeter of a polygon with vertices at (−2, 1) , ​ (−2, 4) ​, (2, 7) , ​ (6, 4) ​, and (6, 1) ​

To find perimeter we add  the length of all the sides

Distance between (−2, 1)  and (−2, 4) = [tex]\sqrt{(-2+2)^2 + (4-1)^2}[/tex]= 3

Distance between(−2, 4) ​and (2, 7) = [tex]\sqrt{(2+2)^2 + (7-4)^2}[/tex]= 5

Distance between (2, 7)  and (6, 4) = [tex]\sqrt{(6 - 2)^2 + (4-7)^2}[/tex]= 5

Distance between (6, 4) ​ and (6, 1) ​= [tex]\sqrt{(6 - 6)^2 + (1-4)^2}[/tex]= 3

Distance between  (6, 1) and (−2, 1) ​= [tex]\sqrt{(-2-6)^2 + (1-1)^2}[/tex]= 8

Perimeter = 3 + 5 + 5 + 3 + 8 = 24

(4) four coordinates are (-7,-1) (-6,4) (3,-3) and (4,2)

Length = Distance between  (3,-3) and (4,2) ​= [tex]\sqrt{(4-3)^2 + (2+3)^2}[/tex]= [tex]\sqrt{26}[/tex]

Width = Distance between (-6,4) and (4,2) ​= [tex]\sqrt{(4+6)^2 + (2-4)^2}[/tex]= [tex]\sqrt{104}[/tex]

Perimeter = 2(lenght + width) = 2*( [tex]\sqrt{26}[/tex]+[tex]\sqrt{104}[/tex] )

= 30.6 units

The area of the rectangle is [tex]24\;square\;units[/tex].

1. According to the question, the vertices of the rectagle are at ​ [tex](-6, 3) ;(-3, 6) ;(1, 2)[/tex] , and [tex](-2, -1)[/tex].

The distance between two vertices on the coordinate plane is

[tex]D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

So,

[tex]Length=D_1\\D_1=\sqrt{(6-3)^2+(-3+6)^2}\\D_1=\sqrt{9+9}\\D_1=3\sqrt 2 units[/tex]

Similarly,

[tex]Width=D_2\\D_2=\sqrt{(-2+6)^2+(-1-3)^2}\\D_2=\sqrt{16+16}\\D_2=16\sqrt 2\;units[/tex]

The area of the rectangle is equals to product of length and width of the rectabgle.

So,

[tex]Area=length\times width\\Area=3\sqrt{2}\times 4\sqrt{2}\\Area=24\;square\;units[/tex]

Hence, the area of the rectangle is [tex]24\;square\;units[/tex].

Learn more about rectangles here:

https://brainly.com/question/16167300?referrer=searchResults

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