The volume of the largest right circular cylinder (in cubic units) that fits in a sphere of radius 4 units is 154.7 cubic units.
First, draw a diagram. The diagram shows the cylinder inscribed in the sphere. Given that in the diagram the height, h, we can find the radius of the cylinder in terms of r using the Pythagorean Theorem.
h represents half of the total height of the cylinder. choose h instead of h² to simplify things better.
To find the volume of the cylinder, we need to multiply the area of the top by the total height of the cylinder. In other words;
V = π(radius of cylinder)²(height of cylinder)
V = π(√r²−h²)²(2h)
V = 2πh(r²−h²)
V = 2π(r²h−h³)
d/dxV(h) = 2π(r²−3h²) = 0
The 2π divides out and we are left with;
r²−3h² = 0
After some rearranging;
h² = r²/3
Take the square root of both sides.
h = r/√3
To find the volume, we need to put this into the volume equation.
V = 2πh(r²−h²) = 2π(r/√3){r²−(r/√3)²}
V = (2πr/√3)(r²−r²/3)
V = (2πr/√3){(3r²−r²)/3}
V = (2πr/√3)(2r²/3)
V = 4πr³/3√3
V = 4√3πr³/9
Now, put the value of r in the above equation, and we get
V = 4√3π(4)³/9
V = 256√3π/9
V = 154.7 cubic units
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a satellite can momve in a circular orbit about a massive planet radius R which of the following can represent the gravitational potential energy U of this satellite as a function of the radius r of the orbit
The following can represent the gravitational potential energy U of this satellite as a function of the orbital radius r: A satellite can move in a circular orbit around a large planet with radius R.
Now that we know the alternatives for planet orbits, let's investigate why elliptical orbits are the most common.
1) The Solar system has been around for 4.6 billion years. Any planets with hyperbolic or parabolic orbits would have long since vanished.
2) To have a circular orbit, the eccentricity must be precisely zero. It's difficult.
3) An elliptical orbit's eccentricity can range from 0 to 1. Easy, that.
Here, GM/r = [tex]V_{1} ^{2}[/tex] & GM/4r = [tex]V_{2} ^{2}[/tex]
or, [tex]V_{1} ^{2}[/tex] = 4 * [tex]V_{2} ^{2}[/tex]
or, [tex]V_{1}[/tex]= 4* [tex]V_{2} ^{}[/tex]
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We want to estimate the mean number of pages per book in the fiction section of the large school library at a 99% confidence level. A sample of 35 fiction books is randomly selected and the mean number of pages is calculated to be 291.8 pages per book with a standard deviation of 47.6 pages per book.
To estimate the mean number of pages per book in the fiction section of the large school library, we can use a t-test. A t-test is a statistical method for determining the probability that a given sample of data comes from a population with a certain mean value.
Given that the sample size is 35 and the standard deviation is 47.6 pages per book, we can use the t-distribution table to find the t-value for a 99% confidence level.
The t-value for a 99% confidence level and 34 degrees of freedom (sample size - 1) is 2.021.
With this information, we can construct a confidence interval for the mean number of pages per book in the fiction section of the large school library. The confidence interval is given by:
Sample mean ± t-value * (Standard deviation / √Sample size)
Therefore, the confidence interval for the mean number of pages per book in the fiction section of the large school library is:
291.8 ± 2.021 * (47.6 / √35)
The margin of error is approximately 12.2 pages per book.
So the mean number of pages per book in the fiction section of the large school library is between 279.6 and 304 pages per book with a 99% confidence level.
The cost of a council tax bill increased by 5%.
The council tax bill increased by £62.
Work out the cost of the council tax bill before the increase
Answer:
To work out the cost of the council tax bill before the increase, we can use the formula:
Original cost = New cost / (1 + increase percentage)
We know that the council tax bill increased by 5% and the increase is £62. So the new cost of the council tax bill is £62 more than the original cost.
We can use the formula above to find the original cost:
Original cost = £62 / (1 + 0.05)
Original cost = £62 / 1.05
Original cost = £59.04
So the cost of the council tax bill before the increase was £59.04.
a standard deck of 52 cards has 13 ranks (ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king) and 4 suits ($\spadesuit$, $\heartsuit$, $\diamondsuit$, and $\clubsuit$), such that there is exactly one card for any given rank and suit. two of the suits ($\spadesuit$ and $\clubsuit$) are black and the other two suits ($\heartsuit$ and $\diamondsuit$) are red. the deck is randomly arranged. what is the probability that the top card is red and the second card is black?
The probability of the top card being red and the second card being black is P(A and B) = 0.0650.
The probability that the top card is red and the second card is black can be calculated using the formula P(A and B) = P(A) x P(B)
Let A be the event of the top card being red and B be the event of the second card being black.
The probability of the top card being red is P(A) = (26/52), since there are 26 red cards in the deck.
The probability of the second card being black is P(B) = (26/51), since there are 26 black cards left in the deck after taking away the red card from the top.
Therefore, the probability of the top card being red and the second card being black is P(A and B) = (26/52) x (26/51) = (169/2612) = 0.0650.
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3/20 plus 3/5=[tex]3/20 plus3/5[/tex]
What output force is generated when an input force of 630 n is applied to a machine with a mechanical advantage of 3? 21 n 189 n 210 n 1,890 n
The force that a simple machine applies to an object is known as output force. The mechanical advantage exceeds one if the output force exceeds the input force.
How does the output force function?A basic machine's output force is indeed the pressure it puts on an item. The mechanical advantage exceeds 1 when the output force exceeds the input force. Output force minus input force equals the mechanical advantage ratio. Work is made easier by increasing the mechanical advantage.
A 630 N input force is therefore necessary.
a 3 percent mechanical advantage
It can be represented mathematically as follows:
M=f 1/f 2
the output force F1 is
The input force is F2,
and thus
F1=1890 N and 3=F1/630 N
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Answer:
the answer is D. 1,890 N!!!
Find the z-score for the value 66, when the mean is 51 and the standard deviation is 1.
The z score for the value 66, when the mean is 51 and the standard deviation is 1 is 15.
What is an equation?An equation is an expression composed of variables and numbers linked together by mathematical operations.
Z score shows by how many standard deviations the raw score is above or below the mean. It is given by:
z = (raw score - mean)/standard deviation
Given that:
mean = 51, standard deviation = 1. For a value of 66:
z = (66 - 51) / 1 = 15
The z score is 15.
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Halona walks 1.93 kilometers to a neighbor's house in 23 minutes. assuming she walks at a constant speed,write a proportion that represents how many kilometers pls hurry :)
The proportion that represents kilometers Halona walks is 193 kilometers in 2300 minute, that is 193/ 2300.
1 kilometer / x minutes = 1.93 kilometers / 23 minutes
Let x be the kilometers Halona walks in 1 minute. If she walks at a constant speed, as speed is rate of distance covered in unit time
x kilometer / 1 minute = 1.93 kilometers / 23 minutes
So the proportion is:
x kilometer / 1 minutes = 1.93 kilometers / 23 minutes
x kilometer / 1 minutes = 193/ 2300
This proportion represents how many kilometers Halona walks per minute. To find her speed in kilometers per hour, we can multiply the proportion by 60 minutes/hour.
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Five numbers have a median of 8, a mode of 4, a mean of 9 and a range of 11.
Find the five numbers.
Let x1, x2, x3,x4,x5 be 5 nos in increasing order.
Median of 5 nos =[(5-1)/2 +1 ] th value =
3rd value = 8
x3 = 8 ........(0)
Range = Max - Min = x5 - x1
x5 - x1 = 11
x5 = 11 + x1. .......(1)
Mean = sum of values/ no. of values
(x1+x2+x3+x4+x5)/5 = 9
x1+ x2 +8 +x4+ 11+x1 = 45 _____(using (1) and (0))
2*x1 + x2 + x4 = 45-8-11
2*x1+ x2 + x4 = 22-------------(2)
Now mode = value that occurs most number of times
Mode = 4. -------(3)
Using (3) in (2) we get
2*x1 + 4 + 4 = 22
2*x1 = 14
x1 = 7
From (1)
x5 = x1+ 11 = 7+11= 18
So
x1 = 7, x2 = 4, x3 = 8, x4 = 4, x5 = 18
Directions: Use the Law of Sines to find each missing side or angle. Round to the nearest tenth.
Question 10
[tex]\frac{\sin x}{7}=\frac{\sin 85^{\circ}}{8}\\\\\sin x=\frac{7\sin 85^{\circ}}{8}\\\\x \approx 60.7^{\circ}, 119.3^{\circ}[/tex]
However, the second case does not satisfy the angle sum of a triangle, so [tex]x \approx 60.7^{\circ}[/tex].
Question 12
[tex]\frac{\sin x}{19}=\frac{\sin 34^{\circ}}{12}\\\\\sin x=\frac{19\sin 34^{\circ}}{12}\\ \\ x \approx 62.3^{\circ}, 117.7^{\circ}[/tex]
Both of these cases satisfy the angle sum of a triangle.
Given the data set red, red, blonde, blonde, blonde, blonde, brown, black which of the mean, median or mode would you use to describe the typical or central value in this date set? Why?
A. None of these as this data set is quantitative.
B. The median as there are outliers at the high end of the data set causing the mean to be skewed high.
C.The mode as this data set is qualitative and the mean and median require quantitative data.
D. The mean as this data set has no outliers causing the mean to be skewed.
c. The mode is the best measure to describe the typical or central value in this data set.
The data set consists of qualitative values, which means they are not in numerical form and cannot be used to calculate the mean or median. The mode is the best measure to describe the typical or central value because it identifies the value that occurs most often in the data set.
In this case, the value that occurs most often is ‘blonde’, which would be the mode. The mean and median cannot be used because they require quantitative data, such as numerical values, to be calculated.
Additionally, the data set does not have outliers, which would cause the mean to be skewed. By using the mode, we can accurately describe the typical or central value of this data set.
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a sumbmarine dives 300 feet every 2 minutes, and 6/750 feet every 45 minutes. find the constant rate at which the sumbmarine dives. give our answer in feet per minute and in feet per hour.
the constant rate at which the submarine dives is 30 feet per minute and 1,800 feet per hour.
feet per minute: 30 feet per minute
feet per hour: 1,800 feet per hour
We can calculate the rate of descent of the submarine by dividing the total distance it dives each time by the total time it took to dive.
For the first scenario where it dives 300 feet every 2 minutes, the rate of descent is 300/2 = 150 feet per minute.
For the second scenario, it dives 6/750 feet every 45 minutes so the rate of descent is 6/750 * 60/45 = 30 feet per minute.
Therefore, the constant rate at which the submarine dives is 30 feet per minute and 1,800 feet per hour.
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Heartsville School is sponsoring a fundraising dinner to raise money for the students attending the International Student Convention. Ajani sold thirty-six tickets, which was twice the number of tickets Miguel sold. How many tickets did Miguel sell?
Answer:
Miguel sold 18 tickets
Step-by-step explanation:
If Ajani's 36 tickets sold was twice the amount of Miguel's, you simply have to divide 36 by 2 for the right answer
36÷2=18
describe how honesty might be measured and defined using an operational definition. check all that apply.
Honesty can be measured by asking people to rate themselves on a scale of 1-10 for honesty, ranking their fellow participants in terms of honesty, conducting a polygraph test to assess physiological responses when presented with specific questions, and conducting interviews to assess how forthright people are in their answers.
An operational definition of honesty can be measured by asking people to rate themselves on a scale of 1-10 for honesty. This would allow participants to self-assess their own level of honesty and provide a baseline for comparison. By observing how often people tell the truth in a given situation, one can measure the level of honesty of a person.
Additionally, a polygraph can be used to measure physiological responses when asking a series of specific questions. This can provide a more accurate measurement of a person’s honesty in comparison to a self-reported scale.
Lastly, conducting interviews with participants can help to assess how forthright people are in their answers. This allows for a more in-depth assessment of honesty by allowing interviewers to observe and assess the sincerity of participants’ answers.
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A circle centered at $A$ with a radius of $1$ and a circle centered at $B$ with a radius of $4$ are externally tangent. A third circle is tangent to the first two and to one of their common external tangents as shown. What is the radius of the third circle
The radius of the third circle is found out to be as , 1cm.
The radius of 1st circle = 1
radius of second circle = 4
Let XYR be external tangent of the circle which is centered at C,.
Then if we will extend the line PQ to R ,
the result will be , XPR being similar to triangle YQR ,
Therefore,
RQ = x
and length of RP = x + 5
Therefore, x / x+ 5 = 1/4
=> 4x = x + 5
=> x = 1
So , the length of QR is found out to be as 1cm.
A tangent to a circle is known as a straight line which touches the circle exactly at one point . A circle can have infinite number of tangents.
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Find the value of x.
5 times the square root of 3.
10
5 times the square root of 2.
5
Step-by-Step Explanation:
We know,
[tex] \cos(angle) = \frac{base}{hypotenuse} [/tex]
Here, angle = 60°, base = 5, hypotenuse = x
Therefore,
[tex] \cos(60) = \frac{5}{x} \\ = > \frac{1}{2} = \frac{5}{x} \\ = > x = 5 \times 2 \\ = > x = 10[/tex]
Answer:
10
Hope it helps.
The solution for x in triangle is,
⇒ x = 10
We have to given that;
A triangle is shown in figure.
Since, A triangle is a three-sided polygon with three vertices, three angles that add up to 180 degrees, and three sides.
Now, We can use the trigonometry formula to find the value of x as;
⇒ cos a = Base / Hypotenuse
Substitute a = 60°, base = 5 , hypotenuse = x in above equation,
⇒ cos 60° = 5 / x
⇒ 1 / 2 = 5 / x
⇒ x = 5 × 2
⇒ x = 10
Thus, The solution for x in triangle is,
⇒ x = 10
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Tavon wants to plant these flowers in
his flower beds. His large flower bed will
hold 3/4 of the flowers. He will plant the
remaining flowers in his small flower bed.
How many flowers will Tavon plant in his
small flower bed?
Answer: 1/4
Step-by-step explanation: He plants 3/4 of the flowers in one garden. There are 1/4 left. 4/4 - 3/4= 1/4
The population of a city decreases by 4.9% per year. If this year's population is 393,000, what will next year's population be, to the nearest individual?
Answer:
Step-by-step explanation:
393,000 x 0.049
= 19257
393,000 - 19,257
=373743
What is the best approximation of the solution to the system to the nearest integer values?
A. (1, 3)
B. (3, 4)
C. (2, 3)
D. (3, 2)
The best estimate of the system solution to the nearest integer values is (2,3).
What is coordinate points?The coordinates represent the location of a point in the 2D coordinate plane with respect to the origin. A point's x-coordinate is its perpendicular distance from the y-axis as measured along the x-axis. A point's y-coordinate is the perpendicular distance from the x-axis measured along the y-axis. A point's Cartesian coordinates (also known as rectangular coordinates) are a pair of integers (in two dimensions) or a triplet of numbers (in three dimensions) indicating signed distances from the coordinate axis. A point's coordinates are a pair of integers that define its precise location on a two-dimensional plane. Remember that the coordinate plane contains two axes that are perpendicular to each other, known as the x and y axes.
Here,
This question is asking us what the coordinates are for the point of intersection. Since the point is not directly on the grid lines, we must approximate.
The point is closest to the value "2" on the x axis.
The point is closest to the value "3" on the y axis.
This means the correct point is (2,3).
The best approximation of the solution to the system to the nearest integer values is (2,3).
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What are the 8 types of operating system?
The types of operating system are:-
1. Batch Operating System.
2. Real-Time Operating System.
3. Time-Sharing Operating System.
4. Distributed Operating System.
5. Embedded Operating System.
6. Network Operating System.
7. Mobile Operating System.
What is an operating system?
An operating system can be thought of as a hardware and user interface. It is in charge of several different activities, including resource allocation, CPU management, file management, and the execution of all programmes. An operating system's function is to offer a setting in which a user can run programmes conveniently and effectively.
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Hey can you help me with this please it’s hard
The events that correspond to each case are given as follows:
a) Exactly one odd number: OEE, EOE, EEO.
b) More odd numbers than even numbers: OOO, OOE, OEO, EOO.
c) Two or more odd numbers: OOO, OOE, OEO, EOO.
Hence the probabilities of each event are given as follows:
a) Exactly one odd number: 3/8.
b) More odd numbers than even numbers: 1/2.
c) Two or more odd numbers: 1/2.
How to calculate the probabilities?A probability is calculated as the division of the number of desired outcomes by the number of total outcomes.
For this problem, we have three trials, each with two possible outcomes, hence the total number of outcomes is given as follows:
2³ = 8.
The meaning of the letters is given as follows:
O: odd number.E: even number.Hence, for example, the event OEE means that an odd number was taken, then an even number and then another even number.
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lost luggage a department of transportation report about air travel found that airlines misplace about 5 bags per 1000 passengers. suppose you are traveling with a group of people who have checked 22 pieces of luggage on your flight. can you consider the fate of these bags to be bernoulli trials? explain.
The fate of the 22 checked bags can be considered the Bernoulli trials.
A Bernoulli trial is a random experiment with two possible outcomes, often referred to as a "success" or "failure." In the context of the lost luggage problem, success would be a checked bag that is not misplaced, and failure would be a checked bag that is misplaced.
For a set of trials to be considered Bernoulli trials, the following conditions must be met:
The trials must be independent, meaning that the outcome of one trial does not affect the outcome of another trial.The probability of success (a bag not being misplaced) must be constant across all trials.The trials must have only two possible outcomes: success or failure.In this case, the fate of the 22 checked bags can be considered Bernoulli trials if the following conditions are met:
The bags are checked in separately, so the outcome of one bag does not affect the outcome of another bag, therefore they are independent trials.The probability of a bag being misplaced is given as 5 bags per 1000 passengers, which is constant across all passengers, including the group of 22 passengers.The trials have two possible outcomes: a bag is misplaced or a bag is not misplaced.Therefore, the fate of the 22 checked bags can be considered Bernoulli trials.
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LN=5x+6 and MP=7x-6
5x+6=7x-6
X=6
LN=?
MP=?
I just need to know the which one is the answer out of (1-4) questions. Please help??
Answer:
1/ 14^4
Step-by-step explanation:
Rules of Exponents
We know that a^-b = 1/a^b
14^-4 = 1/ 14^4
Answer:
[tex]{14}^{ - 4} = \frac{1}{ {14}^{4} } [/tex]
Step-by-step explanation:
To find the answer for this, you have to follow the negative rule of exponents.
That is,
1) If the number with a negative power is in it's numerator, the number with a negative exponent should be put to the denominator and make the power positive.
2) If the number with a negative power is in it's denominator, the number with a negative exponent should be put to the numerator and make the power positive.
Here, we have follow the rule 1.
Ex:
[tex] {a}^{ - n} = \frac{1}{ {a}^{n} } [/tex]
Accordingly, let us find the answer for the question.
[tex] {14}^{ - 4} = \frac{1}{ {14}^{4} } [/tex]
Factoriser -
D = (2x + 3)² + (x-2)(2x + 3)
Answer:
Step-by-step explanation:
Answer:
D = (2x + 3)² + (x-2)(2x + 3)
Factoring D, we get:
D = (2x + 3)² + (x-2)(2x + 3)
= (2x + 3)(2x + 3 + x-2)
= (2x + 3)(3x - 2)
What are the top 10 Excel formulas?
The top 10 Excel formulas are SUM, AVERAGE, COUNT, MAX, MIN, IF, VLOOKUP, CONCATENATE, INDEX and MATCH which are used for performing calculations, counting, finding the maximum and minimum values, testing a condition and returning results, combining text, and searching for a specified item.
1. SUM: Adds the values in a specified range of cells.
2. AVERAGE: Calculates the average of all the cells in a specified range.
3. COUNT: Counts the number of cells in a specified range that contain numbers.
4. MAX: Finds the largest value in a specified range of cells.
5. MIN: Finds the smallest value in a specified range of cells.
6. IF: Tests a condition and provides a value based on the results of the test.
7. VLOOKUP: Searches for a value in the first column of a specified range and returns a value from the same row from another column.
8. CONCATENATE: Combines text from two or more cells into one cell.
9. INDEX: Returns a value from a specified range of cells.
10. MATCH: Searches for a specified item in a specified range and returns its relative position.
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the modulo operation is a one-way function. a.) what makes it a one-way function? b.) explain what the modulo operation does. c.) what is another one-way function?
(a) For a one-way function, it is easy to go from a domain element to its image but challenging to do so from a range element to its pre-image. Understanding that a one-way function doesn't need a key is essential.
(b) When two numbers are split, the modulo operation in computing yields the remainder or the signed remainder of the division
(c) Cryptographically secure hash functions and the Rabin function are examples of one-way functions.
a) In computer science, a one-way function is a function that is easy to compute for all inputs but challenging to reverse given the representation of a random input. The adjectives "easy" and "hard" should be understood in this context as they relate to computational complexity theory, particularly the notion of polynomial time problems.
(b)The C arithmetic operators now include the modulus operator, which works between two available operands. It divides the specified numerator by the supplied denominator to produce the desired result. Alternatively, it yields an integer division residual. As a result, the quantity that is left behind is also frequently an integer.
(c) Examples for one-way functions
Multiplication and factoring.
The Rabin function (modular squaring)
Discrete exponential and logarithm.
Cryptographically secure hash functions.
Other candidates.
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you have some quarters and pennies worth $3.75 and 39 coins altogether. how many of each coin do you have?
There are 14 quarters and 25 number of pennies
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given that some quarters and pennies worth $3.75
0.25x+0.01y=3.75
There are 39 coins altogether
x+y=39
x=39-y
Now plug in x value in 0.25x+0.01y=3.75
0.25(39-y)+0.01y=3.75
9.75-0.25y+0.01y=3.75
9.75-0.24y=3.75
9.75-3.75=0.24y
6=0.24y
Divide both sides by 0.24
25=y
x+y=39
x=14
Hence, there are 14 quarters and 25 number of pennies
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What is the volume of the composite solid? Use 3.14 for pie and round your answer to the nearest cm3. cylinder height is 2.5 radius : 3 inches, cone is height of 3 inches and radius of inches.
(A) 471 cm3
(B) 733 cm3
(c) 707 cm3
(D) 1099 cm3
The volume of the composite solid 28.26 cm³
What is an equation?An equation is an expression composed of variables and numbers linked together by mathematical operations.
The volume is the space occupied for a solid figure.
For the composite:
Volume of composite = volume of cylinder + volume of cone
For cylinder:
height is 2.5, radius : 3 inches
Volume of cylinder = π * radius² * height = π * (3)² * 2.5 = 70.65 cm³
For cone:
height is 3, radius : 3 inches
Volume of cone = (1/3) * π * radius² * height = (1/3) * π * (3)² * 3 = 28.26 cm³
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A room is 20 m long and 14 m broad. It has one door measuring 1 m by 1.7 m and one window measuring 1.8 m by 1.8 m . The cost of painting the walls of the room at the rate of $ 15 per m 2 is $ 12165.9 . Find the height of the room.
Answer:
13.75 m.
Step-by-step explanation:
We can start by calculating the total area of the walls of the room by subtracting the area of the door and window from the total area of the room.
The total area of the room is 20m * 14m = 280 m^2
The area of the door is 1m * 1.7m = 1.7 m^2
The area of the window is 1.8m * 1.8m = 3.24 m^2
The total area of the walls is 280m^2 - 1.7m^2 - 3.24m^2 = 275.06 m^2
Now that we have the total area of the walls, we can divide it by the cost of painting per m^2 to find the height of the room.
The cost of painting per m^2 is $12165.9 / 275.06 m^2 = $44.32/m^2
So we can find the height of the room by dividing the cost by the rate of painting, $12165.9 / $44.32/m^2 = 275.06 m^2 / (20m * h) = 275.06 / 20 = 13.75m
Therefore, the height of the room is approximately 13.75 m.