someone help me please

Answer: 157.5

Step-by-step explanation: To get the volume of an object you must multiply the width x height ÷ it by 2 x length

Therefore 7 x 5 = 35 ÷ 2 = 17.5

17.5 x 9 = 157.5

Answer:

157.5

Step-by-step explanation:

The first step is to find the area of the triangular base. The formula for the area of a triangle is bh/2, or in this case 5×7/2=17.5. Multiplying this by the length of the prism, you get 9×17.5=157.5. Hope this helps!

0.7579 is the best point for the proportion of students at the college who have completed their required English 101 course.

Step-by-step explanation:

"The proportion is written in the fraction form as required number in the numerator and the total number in the denominator."

Here, the 95 students at a college were asked whether they had completed their required English 101 course.

So, the total students = 95

It is given that, 72 students said "yes".

So, the number of completed students = 72

To estimate the best point for the proportion of students who completed their  English 101 course :

Now, the numerator is the no.of students who have completed their required English 101 course.

Proportion = 72 / 95

⇒ the best point is calculated as 72 divided by 95

⇒ 0.7579 (round to four decimal places).

Answer: It is within 2 standard deviations of the mean

Step-by-step explanation:

Answer:

Hence Perimeter for  new rectangle will be 27 units .

Step-by-step explanation:

Given:

A rectangle with enlarged factor of 1.5

L=7 and W=2

To Find:

Perimeter for new rectangle

Solution:

First calculate the new dimensions for new rectangle ,

Given that original length and width as 7 and 2 respectively and it is increasing by 1.5 times of the original ones

So

New length =1.5 *L

=1.5 *7

=10.5 units

And for width,

New width=1.5 *W

=1.5 *2

=3

Hence New dimensions are 10.5 and 3 units .

So perimeter of new rectangle =2(New length + New breadth)

=2(10.5+3)

=2(13.5)

=27 units

Answer:

120

Step-by-step explanation:

Final answer:

The square root of 685 lies between 26 and 27. To the nearest integer, the estimate is 26, and to the nearest tenth, the estimate is 26.2, given that it is roughly 9/53 of the way from 26 to 27.

Explanation:

To estimate the square root of 685 to the nearest integer and tenth, we have to determine which two perfect squares it lies between. The perfect square closer to 685 without going over is 676 (√676 is 26), and the next perfect square is 729 (√729 is 27). Thus, the square root of 685 lies between 26 and 27.

To estimate to the nearest integer, we would round √685 to 26, as it's closer to 676. For the nearest tenth, we need to see how much 685 exceeds 676. It exceeds by 9, and since 729-676 is 53, 685 is roughly 9/53 of the way from 26 to 27. So, a quick estimation for √685 to the nearest tenth could be 26 + (9/53)*1 which is approximately 26.2. Therefore, the estimated value of the surd √685 to the nearest tenth would be 26.2.

Answer:

3 : 2

Step-by-step explanation:

Note that the ratio of perimeters is equal to the ratio of the sides, thus

ratio of corresponding sides = 12 : 8 = 3 : 2

Thus the ratio of perimeters is 3 : 2

The ratio of their perimeters is 3 : 2

Since the ratio of perimeters is equivalent to the ratio of the sides,

So,

ratio of corresponding sides = 12 : 8 = 3 : 2

Thus the ratio of perimeters is 3 : 2

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Answer:

37.699cm

Step-by-step explanation:

thank me and rate!!! plz thank you :)

Answer:

Step-by-step explanation:

Perimeter = 48 feet

2*(length + width) = 48

2*(9 + width ) = 48

Divide both sides by 2.

9 + width = 48/2

9+width = 24

Subtract 9 from both sides.

9+width - 9 = 24 - 9

Width = 15 feet

Answer:

Step-by-step explanation:

You need answer choices for someone to answer.

Answer: It’s an arithmetic sequence

g(n)=50-3•(n-1)

Step-by-step explanation:

Answer:

it’s a arithmetic sequence and answer is 50-3(n-1) please give brainliest anyway bye have a good day but I don’t think u are because u probably bored of khan academy anyway bye have a good day! :D

Step-by-step explanation:

Answer:

It is opposed by the vasa recta.

Step-by-step explanation:

Question:

Which of these is not a property of the renal counter-current multiplier?

It is opposed by the vasa recta.

It exploits the structure of the nephron loop.

It depends on active ion transport to function.

It creates a hyperosmotic interstitial fluid in the kidney medulla.

Answer:

The correct option is;

It is opposed by the vasa recta

Step-by-step explanation:

Counter current multiplication is the process whereby energy is used to build osmotic pressure gradient in the kidney such that water is reabsorbed from the exit tubular fluids reducing the volume of produced urine by increasing the urine concentration while the vasa recta capillaries slows blood flow rate so as to keep the osmotic pressure gradient constant enabling water to be reabsorbed thus concentrating the urine in line with counter current multiplication.

Answer: One book has a greater mass.

Step-by-step explanation:

Jamal has a pair of shoes with a total mass of 960 grams. This means that each shoe has a mass of:

960 grams ÷ 2= 480 grams per shoe.

Jamal also has four identical books with a total mass of 2 kilograms. Note that 1000 grams make a kilograms. Therefore 2 kilograms will be (2 × 1000 grams) = 2000 grams.

Each book will have a mass of:

2000 ÷ 4 = 500 grams per book.

One shoe has a mass of 960 divided 2 = 480 grams . One book has a mass of 2000 divided 4 = 500 grams . So one book has a greater mass.

Answer:

Step-by-step explanation: solution solved below

Final answer:

To find the conditional density of Λ given X = x, calculate the joint density function of X and Λ and apply the formula for conditional density.

Explanation:

The conditional density of Λ given X = x when Λ is a random variable with distribution Exponential(β) can be found as follows:

Calculate the joint density function of X and Λ.

Use the formula for conditional density: f(Λ|X=x) = f(X,Λ) / f(X=x).

Identify the type of the conditional density based on the distribution it follows.

Answer:

In 2.4 minutes the fan made 105.5 revolutions.

Step-by-step explanation:

In order to solve this problem we need to convert the speed from radians to revolutions. To do that we can use a rule of three as shown below:

2pi rad/s -> 1 rev/s

4.6 rad/s -> x rev/s

2pi/4.6 = 1/x

2pix = 4.6

x = 4.6/2pi = 2.3/pi rev/s

Now we need to conver the time at which the blade was spinning from minutes to seconds, to do that we need to multiply by 60.

t = 2.4*60 = 144 s

To calculate the number of revolutions we multiply the angular velocity of the fan by the time it was spinning:

rev = (2.3/pi)*144 = 331.2/pi = 105.5 revolutions

Answer:

105.4 revolutions

Step-by-step explanation:

By converting 2.4 min into seconds, we'll have

2.4 minutes = 60 x 2.4 = 144 seconds.  

Now, in 2.4 minutes, the fan rotate 4.6 [rad/s] x 144s = 662.4 radians

As the answer is required in revolution

therefore, 1 radian = 0.159155 revolutions

so  0.159155 x 662.4 = 105.4 revolutions

The fan rotated 105.4 revolutions in 2.4 minutes

Answer:

2,376

Step-by-step explanation:

Answer:

Step-by-step explanation:

Convert the yards into inches and add a label at the end. You could also find out how many inches are in one yard and times the amount of inches you got from that one yard by 66.

Answer:

3.4%

Step-by-step explanation:

Ramons monthly salary is $1600

The electricity is $53.60

So, to find the percentage of his earnings spent on electrcity, we´re going to divide:

[tex]\frac{53.60}{1600} = 0.0335[/tex]

multiply that by 100 to get the percent

0.0335 x 100 = 3.35%

rounded to the nearest tenth would be 3.4%

i hope this helps!

Answer:

Median = 102

Step-by-step explanation:

To find the median we will following the steps below;

study the numbers, if they are not arrange from ascending to descending order, you try to do that.

87,98,106,82,111,120

82, 87, 98,106, 111, 120

Pick the middle number, if there is just one number that falls in the middle, that number is your median, but if there two numbers that falls in the middle, you add the two numbers and then divide by 2.

In this case, two numbers falls in the middle, so we will add and divide by 2

That is;

Median = 98 + 106   /2

              =204 /2

               =102

Median = 102

Answer:

P(blue and green) = P(blue)*P(green) = (5/8)(2/8) = 10/64

The probability that the first ball is blue and the second is green, with no replacement, is approximately 0.179 or 17.9%.

The subject of this question pertains to probability, specifically the concept of dependent events in the realm of combinatorics. The problem involves an urn with 8 balls of different colors. The question asks us to find the probability that a blue ball is drawn first and a green ball second, with no replacement.

Firstly, we calculate the individual probabilities. The probability of drawing a blue ball first is 5/8, because there are 5 blue balls out of a total of 8. Since the blue ball isn't replaced, there are now 7 balls left in the urn, and therefore, the probability of drawing a green ball next is 2/7. To find the combined probability, we multiply the individual probabilities: (5/8) * (2/7) = 10/56 = 0.1786 (rounded). So the probability that the first ball is blue and the second is green is approximately 0.179 or 17.9%.

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Answer:

The rate of the slower car is 69km/hr

Step-by-step explanation:

Please kindly check the attached files for explanation.

The gender that shows greater variability in their playing time is females (teen girls).

It may depend on conditions. The dispersion can be measured in many ways. We can find range (max value - min. value), or interquartile range(the absolute difference between the first and third quartile ), etc to measure the variability.

A box plot has 5 data description.

IQR(inter quartile range)  is the dfference between third and first quartile.

We will use the interquartile range here to find the variability in the playing time taken by different genders.

From the box plots given, we get the data of first and third quartiles from the left and right limits of boxes.

For males (teen boys):

IQR is 17-9 = 8

For females (teen girls):

IQR is 15-3 = 12

Thus, there is greater variability in playing time of teen girls (females).

Thus, the gender that shows greater variability in their playing time is females (teen girls).

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Girls have a larger interquartile range (IQR), indicating more varied playing times compared to boys.

Let's break down the analysis in detail:

1. Interpretation of Box-and-Whisker Plots:

  - Box-and-whisker plots provide a visual representation of the distribution of a dataset. They show the median, quartiles, and range of the data.

2. Understanding Interquartile Range (IQR):

  - The interquartile range (IQR) is a measure of statistical dispersion, which is calculated as the difference between the upper quartile (Q3) and the lower quartile (Q1). It represents the spread of the middle 50% of the data.

  - A larger IQR indicates greater variability in the dataset.

3. Comparison of IQRs for Boys and Girls:

  - For boys:

    - Lower quartile (Q1) = 9

    - Upper quartile (Q3) = 17

  - IQR for boys = Q3 - Q1 = 17 - 9 = 8

  - This means that the middle 50% of boys' playing time falls within the range of 8 hours.

  - For girls:

    - Lower quartile (Q1) = 3

    - Upper quartile (Q3) = 15

  - IQR for girls = Q3 - Q1 = 15 - 3 = 12

  - This indicates that the middle 50% of girls' playing time spans a range of 12 hours.

4. Analysis and Conclusion:

  - The interquartile range for girls (12 hours) is larger than that for boys (8 hours).

  - Therefore, girls' playing time exhibits greater variability compared to boys'.

  - This suggests that there is more diversity in the amount of time girls spend playing video games each week, as indicated by the wider spread of their data points around the median.

5. Reasoning Behind the Conclusion:

  - While both groups have the same overall range of possible values (from 0 to 28 hours), the spread of data within the middle 50% (as captured by the IQR) is wider for girls, indicating greater variability in their playing time.

So, based on the analysis of the interquartile ranges, we conclude that girls show greater variability in their playing time compared to boys in this dataset.

Answer: x - 4 = 9  (x will equal 13)

What I did was since 4 is less than 13 we could use 13-4 since 4 is less than 13.

13-4 will get u 9 so that x will equal 13

13-4=9

Answer:

Answer: x - 4 = 9  

Step-by-step explanation:

Answer: A and D

I just worked on this!

Answer:

1 and 4... A and D

Step-by-step explanation:

Answer:

The radius is decreatsing at a rate 0.78 cm per second.

Step-by-step explanation:

We are given the following in the question:

[tex]\dfrac{dl}{dt} = 0.7\text{ cm per second}[/tex]

Instant radius,r = 2 cm

Instant length,l = 9cm

The radius of the cylinder decreases.

Volume of cylinder =

[tex]V =\pi r^2l[/tex]

Since the volume of the cylinder does not changes, we can write:

[tex]\dfrac{dV}{dt}=0[/tex]

Rate of change of volume:

[tex]\dfrac{dV}{dt} = \pi(2r\dfrac{dr}{dt}l + r^2\dfrac{dl}{dt})[/tex]

Puttiung values, we get

[tex]0 = \pi(2(2)\dfrac{dr}{dt}(9) + (2)^2(0.7))\\\\\dfrac{dr}{dt}=-\dfrac{4\times 0.7}{4\times 9} \approx -0.78[/tex]

Thus, the radius is decreatsing at a rate 0.78 cm per second.

Using differentiation, it is found that the radius is increasing at a rate of 0.35 cm/second.

The length of a cylinder is the diameter, which is double the radius, hence:

[tex]l = 2r \rightarrow r = \frac{l}{2}[/tex]

Applying differentiation, the rate of change of the radius is given by:

[tex]\frac{dr}{dt} = \frac{1}{2}\frac{dl}{dt}[/tex]

We are given that the rate of change of the length is [tex]\frac{dl}{dt} = 0.7[/tex], hence:

[tex]\frac{dr}{dt} = \frac{1}{2}\frac{dl}{dt} = \frac{1}{2}(0.7) = 0.35[/tex]

The radius is increasing at a rate of 0.35 cm/second.

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Answer:

40615

Step-by-step explanation:

Note, rounding off decimals involves observing if the said decimal is up to the value of 5. If it is, then it can be rounded up, if not, its rounded off.

Since we need to round the numbers to the second decimal before performing the operation, we will have, 8123÷0.2

Note, 8123 has no decimal so we ignore

But 0.211 has a second decimal which is the first 1 so because it's not up to 5, we round it off to 0.

Hence we have 8123 ÷ 0.2= 40615.0

Since our answer has no decimal, we leave it like that.

Answer:

38680.95

Step-by-step explanation:

Solution:-

- We will round the denominator of the fraction " 0.211 " to two decimal places.

                               0 .  2      1        1

                                    1st   2nd   3rd

               3rd digit = 1 < 5  ... "Truncate the 3rd decimal value and on wards"

                       ans:  0.21

- Now perform the division:

                               8123 / 0.21 = 38680.95238

- Now again round the resulting answer to 2nd decimal place:

                       38680.  9      5       2

                                    1st   2nd   3rd

               3rd digit = 2 < 5 ... "Truncate the 3rd decimal value and on wards"

- The resulting answer will be after rounding to 2nd decimal place:

                  Answer: 38680.95

Answer:

Sample Response:

Mercury is used for making thermometers, barometers, diffusion pumps, and other laboratory instruments. It can also be used to make mercury-vapor lamps, advertising signs, and mercury switches as well as pesticides, dental preparations, batteries, and catalysts.

Mercury is used for making thermometers, barometers and mercury switches

Mercury is used for making thermometers, barometers, diffusion pumps, and other laboratory instruments.

It can also be used to make mercury-vapor lamps, advertising signs, and mercury switches as well as pesticides, dental preparations, batteries, and catalysts.

Therefore, the three uses of mercury are making thermometers, barometers and mercury switches

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Vincent will be able to buy the sneakers.

1. David: $90

  - David's total cost: $91.16

  - David cannot afford the sneakers.

2. Vincent: $95

  - Vincent's total cost: $93.74

  - Vincent can afford the sneakers.

To determine who will be able to buy the sneakers, let's calculate the total cost including sales tax for each boy:

1. David:

  - Sneaker cost: $86

  - Sales tax rate: 6%

  - Total cost [tex]\(= 86 + 0.06 \times 86\)[/tex]

  - Total cost [tex]\(= 86 + 5.16\)[/tex]

  - Total cost [tex]\(= 91.16\)[/tex]

2. Vincent:

  - Sneaker cost: $86

  - Sales tax rate: 9%

  - Total cost [tex]\(= 86 + 0.09 \times 86\)[/tex]

  - Total cost [tex]\(= 86 + 7.74\)[/tex]

  - Total cost [tex]\(= 93.74\)[/tex]

Answer:

  5.7 cm or 2 1/4 in

Step-by-step explanation:

Your tape measure is not shown.

  On my tape measure, 5.7 cm is the closest mark. On the inch scale, 2 1/4 inches is the next-closest mark.

_____

On a tape measure graduated in 1/32 inch between 2 and 3 inches, you can find the closest mark by rounding to the nearest 32nd:

  2.23607 × 32 ≈ 71.55 ≈ 72 --- 32nds of an inch

  72/32 = 2 1/4 . . . . the closest mark on an inch ruler graduated in 32nds

__

For a ruler graduated in millimeters, you can find the closest millimeter in the same way. There are 25.4 mm to the inch.

  2.23607 in × 25.4 mm/in ≈ 56.80 mm ≈ 57 mm

  57 mm = 5.7 cm . . . closest mark on metric scale

__

When we check the error, we find the metric mark is closer than the inch mark.

  5.7 cm ≈ 2.24409 in . . . . error of 0.00802 in

  2 1/2 in = 2.25000 in . . . error of 0.01393 in

Final answer:

The mark on the tape measure closest to 2.23607 inches is just above 2 3/16 inches, which can be more precisely measured with a tape measure that features millimeter or half-millimeter markings.

Explanation:

The student has asked which mark on the tape measure is closest to 2.23607 inches. To answer this question, we must consider the precision of the measuring device. When using a ruler without millimeter markings, such as the bottom ruler mentioned, the measurement can be understood in tenths of a centimeter. This would make it difficult to conclusively measure and report on the hundredths digit for a length.

Conversely, using a tape measure with millimeter or even half-millimeter markings (akin to the top ruler), the user can measure more precisely. Given that 1 inch equals 2.54 centimeters, 2.23607 inches would be approximately 5.679818 centimeters. This would be between the 2.5 cm and 2.6 cm marks on a metric tape measure or between 2 3/16 inches and 2 1/4 inches on an imperial tape measure; 2.23607 inches is very close to, but slightly above, 2 3/16 inches, so this would be the mark on an imperial tape measure that is closest to 2.23607 inches.

Answer:

[tex]x\geq 60[/tex] where x denotes height of Allie

Step-by-step explanation:

An inequality compares two values. One value is less than, greater than, or not equal to another value.

Given: Allie is waiting to be tall enough to ride the thunder dragon roller coaster. You have to be at least 60 inches to ride.

To write: an equality

Solution:

Let the height of Allie be x inches.

As a person has to be at least 60 inches to ride,

the inequality can be [tex]x\geq 60[/tex]

Answer:

Positive

Step-by-step explanation:

If a is positive, the parabola opens up or to the right. If it's negative it does the opposite.