if you double its height of a cylinder what is double the surface area of a cylinder? explain using words or an example

Answer:

389 hours and 23 minutes

Step-by-step explanation:

16x24=384

384+=5=389

and 23 minutes

Answer:

Its B: -18

Step-by-step explanation:

- - makes a +

-57+37=-18

Answer: it’s B

hope this helps

In given word problem Andre has more money than Elena after four weeks.

What is word problem?

A math word problem is a question that is written as one or more sentences and asks students to use their mathematical understanding to solve an issue from "real world." In order to understand the word problem, they must be familiar with the terminology that goes along with the mathematical symbols that they are used to.

Here,

Initial investment of Andre= $50

She add $5 per week for next 4 weeks , then

=> 4×5 = $20

Then total savings of Andre = $50+$20=$70.

Now Initial investment of Elena = $5

She adds $10 for each 4 weeks then

=> 10×4=$40.

Now total savings of Elena = $40+$5=$45.

Here $70>$45.

Hence after 4 weeks Andre has more money than Elena.

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To transform the regression equation, you would divide both sides of the equation by the square root of Var(ut), which is σ√(zt). This transformation helps in obtaining the transformed regression coefficients and standard errors that account for the heteroscedasticity in the error term.

When the variance of the error term (ut) is related to a known variable (zt), it implies the presence of heteroscedasticity in the regression model. Heteroscedasticity means that the variability of the error term is not constant across different levels of the independent variables.

To address this issue, we can transform the regression equation by dividing both sides by the square root of the variance of the error term, which is σ√(zt). This transformation is known as the weighted least squares (WLS) estimation.

By dividing both sides of the equation, we can obtain the transformed regression equation with the error term divided by its standard deviation. This transformation accounts for the heteroscedasticity by giving different weights to the observations based on the variability of the error term. It allows for a more appropriate estimation of the regression coefficients and standard errors, as it gives more weight to observations with smaller error variances and less weight to observations with larger error variances.

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Answer:

1

Step-by-step explanation:

Answer:

28.91

Step-by-step explanation:

Answer:

\(x = -8\)

Step-by-step explanation:

We can solve for x by isolating it on one side of the equation.

If we're given the equation \(3x + 5 - x = x-3\), we can simplify it down.

First let's combine like terms on the left side.

\(2x + 5 = x-3\)

Now subtract x from both sides:

\(x + 5 = -3\)

Subtract 5 from both sides:

\(x = -8\)

Hope this helped!

Answer:

-8

Step-by-step explanation:

Simplify to 2x + 5 = X - 3

Subtract and you end up with x = -3 - 5

Answer: $800.

Step-by-step explanation:

To find the income tax of $20,000 simply multiply 20,000 by the decimal of 4%.

20,000 x 0.04 = 800

According to the statement, the diameter increases by 1/8 inch each year, which means that the increase of the diameter is given by the number of years times 1/8.

Taking x as the increase and y as the number of years, the equationthat represents x in terms of y is:

Answer:

.6 km

Step-by-step explanation:

We need to convert meters to kilometers.

1000 meters is 1 km.

600 meters * 1 km/ 1000m

600/1000  km

.6 km

Answer:

Step-by-step explanation:

The race course is 600 meters long. What is the length of the race in kilometers?

1000 meters = 1 Kilometer

so

600 : 1000 =

0.6 Km

Answer:

18 + 5 = 23

Step-by-step explanation:

The data can be tallied into a frequency distribution using a class interval of 100 and a starting point of 0.

To create a frequency distribution, we group the data into intervals or classes and count the number of data points falling within each interval. The class interval represents the range of values covered by each class, and the starting point determines the first interval.

Here is an example of how the data can be tallied into a frequency distribution using a class interval of 100 and a starting point of 0:

```

Class Interval    Frequency

0 - 99            12

100 - 199         18

200 - 299         24

300 - 399         15

400 - 499         10

500 - 599         8

600 - 699         5

700 - 799         3

800 - 899         2

900 - 999         1

```

In this frequency distribution, the data is divided into classes based on the class interval of 100. The first class, from 0 to 99, has a frequency of 12, indicating that there are 12 data points falling within that range. The process is repeated for each subsequent class interval, resulting in a frequency distribution table.

By organizing the data into a frequency distribution, we gain insights into the distribution and patterns within the dataset. It provides a summarized view of the data, allowing us to identify the most common or frequent values and analyze the overall distribution.

In summary, the data has been tallied into a frequency distribution using a class interval of 100 and a starting point of 0. The frequency distribution table presents the number of data points falling within each class interval, enabling a better understanding of the distribution of the data.

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Step-by-step explanation:

Set A is a subset of set B if all the elements of A are also the elements of Set B.. (common element)

The above set have 0 common elements so.. if there is no common element and are subsets then it means that there arent any elements in both the sets

so, the answer for the question would be "both the Sets A and B are the empty sets"

Answer:

The dimensions of the field is 185 yards by 48 yards

Step-by-step explanation:

Here, we are interested in calculating the dimensions of the field.

Let the width of the field be x yards

From the question, we are made to know that the length of the field is 7 yards less than quadruple ( 4 times) the width

So mathematically, the length of the field will be ;

(4x -7) yards

The perimeter of the field mathematically is:

2(l + b)

Thus;

2(x + 4x- 7) = 466

2(5x -7) = 466

divide both side by 2

5x - 7 = 466/2

5x - 7 = 233

5x = 233 + 7

5x = 240

x = 240/5

x = 48 yards

Length of field is; 4x -7 = 4(48) -7 = 192 - 7 = 185 yards

The equation of line is y = 12x and the number of boxes the shipping company can pack in 18 hour period is 216 boxes

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given data ,

Let the number of hours be x

Let the number of boxes be y

Let the equation of line be represented as A

Now , the value of A is

Let the first point be P ( 5 , 60 )

Now , the slope of the line m = y/x

Substituting the values in the equation , we get

Slope m = 60 / 5 = 12

Now , the equation of line is y - y₁ = m ( x - x₁ )

Substituting the values in the equation , we get

y - 60 = 12 ( x - 5 )

y - 60 = 12x - 60

y = 12x

Now , when x = 18 hours

y = 12 ( 18 ) boxes

y = 216 boxes

Hence , the number of boxes is 216 boxes

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Answer:

16870

Step-by-step explanation:

Answer: um 16870 I guess

Step-by-step explanation: I hope I help and can you plz give me a brainliest

Answer:

yes its a proportion

Step-by-step explanation:

Rounding to the nearest tenth of a mile, the new altitude after 15 minutes of descent is approximately 3.1 miles.

To determine the new altitude of the airplane after 15 minutes of descent, we need to calculate the change in altitude during that time period. We can use trigonometry to find the vertical component of the scent.

Given:

Speed of the airplane: 400 mph

Angle of descent: 2°

Time of descent: 15 minutes

First, let's convert the time of descent from minutes to hours:

15 minutes = 15/60 = 0.25 hours

Now, let's calculate the vertical component of the descent using trigonometry:

Vertical component = Horizontal distance x tan(angle of descent)

Since the horizontal distance traveled can be calculated as the product of speed and time:

Horizontal distance = Speed x Time

Horizontal distance = 400 mph x 0.25 hours = 100 miles

Now, substituting the values into the equation for the vertical component:

Vertical component = 100 miles x tan(2°)

Using a scientific calculator, we find that tan(2°) is approximately 0.034921.

Vertical component = 100 miles x 0.034921 ≈ 3.4921 miles

Therefore, the change in altitude during the 15-minute descent is approximately 3.4921 miles.

To find the new altitude after the descent, we subtract the change in altitude from the initial altitude of 6.6 miles:

New altitude = 6.6 miles - 3.4921 miles ≈ 3.1079 miles

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Answer:

Step-by-step explanation:

we should do multiplications first:

1)

\(1)12a^{2}*3ba=12a^{3}b\\2)2ab*3ab^{2}=6a^{2}b^{3}\\3)11aba=11a^{2}b\\4)12a^{3}b+6a^{2}b^{3}+11a^{2}b=a^{2}b(12a+6ab^{2}+11)\)

2)

\(1)1.5xy^{2}*(-4)xyz=-6x^{2}y^{3}z\\2)-4mnk*5m^{2}n^{3}k=-20m^{3}n^{4}k^{2}\\3)-6x^{2}y^{3}z-20m^{3}n^{4}k^{2}\)

(a) To find the critical numbers and discontinuities of f(x) = x² / (x² - 81), we first find its derivative f'(x) and check where the denominator equals zero.

f'(x) = [(2x)(x² - 81) - (2x)(x²)] / (x² - 81)², f'(x) = (2x)(-81) / (x² - 81)², Critical numbers are the values of x for which f'(x) = 0. In this case, there are no critical numbers, as the numerator is never equal to zero. Discontinuities occur when the denominator is equal to zero: x² - 81 = 0
x² = 81
x = ±√81
x = ±9
Thus, the discontinuities are x = -9 and x = 9. (b) To find the open intervals on which the function is increasing or decreasing, we analyze the sign of the derivative f'(x). f'(x) is positive when -81(2x) < 0, which occurs in the interval (-∞, -9) ∪ (9, ∞). f'(x) is negative when -81(2x) > 0, which occurs in the interval (-9, 9).

So, the function is increasing on (-∞, -9) ∪ (9, ∞) and decreasing on (-9, 9).
(c) Since there are no critical numbers, there are no relative extrema (maximum or minimum) for this function. So, the answer is DNE for both relative maximum and relative minimum.

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Answer:

Step-by-step explanation:

(a) The firm's output supply function is given by q = (p + 199) / 2.

(b) The market-equilibrium price is $32.56, and the equilibrium number of firms is 10.

(c) Each firm sells 70 computers in the long run.

(39 - 0.009q) = (2q - 2) / q

Simplifying the equation, we find:

q = (p + 199) / 2

This represents the firm's output supply function.

p = 39 - 0.009((p + 199) / 2)

Simplifying and solving for p, we get:

p ≈ $32.56

Substituting this price back into the output supply function, we find:

q = (32.56 + 199) / 2 ≈ 115.78

Given that each firm produces 70 computers in the long run, we can calculate the equilibrium number of firms:

Number of firms = q / 70 ≈ 10

70 * 10 = 700

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To solve the problem we must know about the equation of a circle and complex numbers.

Radius² = (Distance between the center and any point on the circle)²

Radius = \(\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\)

Complex Number, z = (x +iy)

Another point that will lay on the same circle is (12 + 10i).

Given to us

Solution

We know that equation for a circle can be written as,

Radius of the Circle

= √(Distance between the center and any point on the circle)²

Radius of the Circle = √[4-19]²+[-5 -(-13)]²

                                 = √[-15]²+[8]²

                                 = √225 + 64

                                 = √225 + 64

                                 = √289

                                 = 17

Now compare the distance between the center of the circle and the points.

A.)  –11 –3i

Distance between the center and point on the circle

= √[4-(-11)]² + [-5 - (-3)]²

= √[15]² + [-2]²

= √225 + 4

= √229

B.)  –4. 5+3. 5i

Distance between the center and point on the circle

= √[4-(-4.5)]² + [-5 - (3.5)]²

= √[9.5]² + [-8.5]²

= √90.25+ 72.25

= √162.5

C.)  12 + 10i

Distance between the center and point on the circle

= √[4-(12)]² + [-5 - (10)]²

= √[-8]² + [-15]²

= √64+ 225

= √289

= 17

D.)  21 + 12i.

Distance between the center and point on the circle

= √[4-(21)]² + [-5 - (12)]²

= √[17]² + [-17i]²

= √289+ 289

= √578

Hence, another point that will lay on the same circle is (12 + 10i).

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1) Translation

2) Rotation

3) Translation

4) None of these

Answer:

h = 25x

Step-by-step explanation:

Given the following

height of building = h

height of diagram = 25cm

If the height of the building is x times the height of the diagram, then;

h = x * 25

h = 25x

Hence the required equation is h = 25x

The answers to all parts shown below.

1. There are 3 ways to choose a shirt and 2 ways to choose a pair of pants.

By the multiplication principle, there are 3 × 2 = 6 ways to choose an outfit consisting of one shirt and one pair of pants.

Therefore, the answer is 6.

2. There are two choices of cones and three choices of ice cream and two choices of toppings.

So, the number of possible choices is:

= 2 (choices of cones) x 3 (choices of ice cream) x 2 (choices of toppings)

= 12 possible choices.

3. To see why, consider that there are 2 options for the crust and 5 options for the topping. You can combine any of the 2 crust options with any of the 5 topping options, giving you a total of 2 x 5 = 10 different pizzas.

4. When rolling a standard number cube, there are 6 possible outcomes (1, 2, 3, 4, 5, or 6). When flipping a coin, there are 2 possible outcomes (heads or tails).

To find the total number of different outcomes when rolling a number cube and flipping a coin, you can multiply the number of outcomes for each event:

Total outcomes

= (number of outcomes for rolling a number cube) x (number of outcomes for flipping a coin)

= 6 x 2

= 12

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The value of x is 7.82

Following these procedures will help us use proportions to solve challenges in the real world:

1. Set up two ratios comparing the identical quantities using the information from the problem.

2. Create a proportion by setting the ratios equal.

3. To find the proportional unknown, use cross multiplication.

\(AB/ AD = TS/ UT\)

\(7/ 14.8= 3.7/ x\)

On cross multiplying we get

7x= 54.76

x= 7.822

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Answer:

5cm

Step-by-step explanation:

Convert 1.5m into cm to make it easier to solve.

1.5m --> 150cm (*100)

The real bike length is 30 times larger than the scale. So to undo this we need to divide by 30.

150cm / 30 = 5cm

The equation formed by the description in question is: x + 11 = 2(x - 12), and the solution for this equation is: x = 35 .

What is equation?

Am equation is a mathematical statement in which we show that two amounts or expressions are equal using mathematical symbols.

For example 2x + 3y = 10

Let the number be x,

As given in the question, Number increased by 11.

this can be written as expression:

x + 11

Again given in the question ,

twice the number decreased by 12

this can be written as expression:

2(x - 12)

Equating both expressions:

x + 11 = 2(x - 12)

x/2 + 11/2 = x - 12

11/2 + 12 = x - x/2

(35/2 )2 = x

x = 35

Therefore, the solution for the equation formed is x = 35

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