PLEASE HELP ILL GIVE MORE IF ITS RIGHT

The total surface area is 640.56 in².

We have,

The TSA (Total Surface Area) of a cone is given by the formula:

TSA = πr² + πrℓ

Now,

We see that,

There are two cones so we find the TSA for both the cones and add them up to get the TSA.

So,

Cone 1:

r = 6 in

l² = r² + h²

l² = 36 + 64

l² = 100

l = 10

So,

TSA = πr² + πrℓ

= 3.14 x 36 + 3.14 x 6 x 10

= 113.04 + 188.4

= 301.44 in²

Cone 2:

r = 6 in

l = 12 in

TSA = πr² + πrℓ

= 3.14 x 6 x 6 + 3.14 x 6 x 12

= 113.04 + 226.08

= 339.12 in²

Now,

Total surface area.

= 301.44 + 339.12

= 640.56 in²

Thus,

The total surface area is 640.56 in².

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Answer:

well we need to see a visual representation of figure 1 and figure 2

Step-by-step explanation:

The product of (3 - √5)(7 - √5) simplifies to 26 - 10√5.

To multiply and simplify the expression (3 - √5)(7 - √5), we can use the distributive property of multiplication over addition. Here are the steps:

1. Start by multiplying the first terms in each set of parentheses: 3 * 7 = 21.

2. Then multiply the outer terms: 3 * (-√5) = -3√5.

3. Next, multiply the inner terms: -√5 * 7 = -7√5.

4. Finally, multiply the last terms: -√5 * -√5 = 5.

Now we can combine these terms to simplify the expression:

21 + (-3√5) + (-7√5) + 5

Combine the like terms: 21 + 5 - 3√5 - 7√5

Combine the constants: 21 + 5 = 26.

Combine the radical terms: -3√5 - 7√5 = -10√5.

The final simplified expression is: 26 - 10√5.

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With the same point estimate, Matthew's estimate will have a smaller margin of error due to the larger sample size and wider confidence interval.

The margin of error is influenced by the sample size and the chosen confidence level. Generally, a larger sample size leads to a smaller margin of error, and a higher confidence level leads to a larger margin of error.

Matthew's sample size is four times larger than Katrina's sample size (400 vs. 100). Assuming they obtained the same point estimate, Matthew's estimate will have a smaller margin of error compared to Katrina's estimate. This is because a larger sample size allows for more precise estimation and reduces the variability in the estimate.

Additionally, Katrina constructed a 95% confidence interval, while Matthew constructed a 99% confidence interval. A higher confidence level requires a wider interval to capture the true population parameter with a higher degree of certainty. Therefore, Matthew's estimate will have a smaller margin of error compared to Katrina's estimate.

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Micah increased his practice time by 80%.

What is percent?

A percentage in mathematics is a number or ratio that is expressed as a fraction of 100. The abbreviations "pct.", "pct.", and occasionally "pc" are also used to indicate it, though the percent sign, "%," is most frequently used. A percentage has no dimensions and no standard measurement.

Given:

Micah is preparing for a piano recital .

He practices for 50 minutes on Monday and 90 minutes on Wednesday.

Micah increased his practice time by 40%.

%increase = (Final value - starting value) / |starting value| x 100

                 = (90 - 50) / |50| x 100

                  = 40/50 x 100

%increase = 80%

Hence, Micah increased his practice time by 80%.

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Complete question:

The probability that the coin is a biased coin after one flip that results in tails is about 10.9%.

Bayes' theorem is a mathematical formula that helps us update our beliefs about the probability of an event occurring based on new information or evidence. It involves the prior probability, which is our initial belief about the probability of an event, and the likelihood of the evidence given that the event has occurred. By combining these two pieces of information, Bayes' theorem allows us to calculate the updated or posterior probability of the event occurring.

After one flip that results in tails, the probability that the coin is a biased coin can be found using Bayes' theorem:

P(biased coin | tails) = P(tails | biased coin) * P(biased coin) / P(tails)

P(tails | biased coin) = 3/5 (given)

P(biased coin) = 0.1 (given)

P(tails) = P(tails | fair coin) * P(fair coin) + P(tails | biased coin) * P(biased coin)

= 1/2 * 0.9 + 3/5 * 0.1

= 0.55

Therefore,

P(biased coin | tails) = (3/5 * 0.1) / 0.55

= 0.109 (approximately)

Thus, the probability that the coin is a biased coin after one flip that results in tails is about 10.9%.

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Assume that 90% of the coins in circulation are fair, and the remaining 10% are biased coins that give tails with probability 3/5. i hold a randomly chosen coin and begin to flip it.

(a) after one flip that results in tails, what is the probability that the coin i hold is a biased coin? after two flips that both give tails? after n flips that all come out tails?

The number of silver and gold medals won is given as follows:

75.

The number of silver and gold medals is obtained applying the proportions in the context of this problem.

The percentage equivalent to silver and gold medals is given as follows:

20 + 30 = 50%.

Hence half the number of medals was either silver or gold, thus the number is given as follows:

0.5 x 150 = 75 meddals.

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Estimating an angle measure in a problem can be useful when the actual angle measurement cannot be determined

Estimates are simply used to approximate and to guess the actual value of a measured quantity

In angles, when the actual measurement is not known, the estimate can be used in place of the actual value

Hence, estimating an angle measure can be useful when the actual angle measurement cannot be determined

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If the population density for the area is 18.8 residents per square mile, to the nearest hundred, approximately 34,000 residents would be infected.

When a virus is accidentally released from a CDC lab, and it infects everyone within a 24-mile radius from the CDC lab, then if the population density for the area is 18.8 residents per square mile, to the nearest hundred, how many people were infected.

The number of people infected within the 24-mile radius from the CDC lab is calculated as follows:

The area of a circle with a radius of 24 miles is A = πr²,

which is A = π(24²) = 1,809.56 square miles, and the population density for the area is 18.8 residents per square mile.

Therefore, the number of people infected is calculated by multiplying the area by the population density:

Residents infected = area x population density

= 1,809.56 x 18.8 ≈ 34,037.

Approximating to the nearest hundred yields 34,000.

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Answer:

As x --> ∞, then y --> - ∞

Step-by-step explanation:

As the value of x increases(as the graph goes right), the graph seems to go down, meaning the y-values are getting more an more negative. This means that as x approached infinity, the y values approach negative infinity ( x --> ∞, y --> - ∞ ).

As the value of x decreases(going to the left), the graph seems to go higher and higher. Therefore, as x approaches negative infinity, the y-value approach infinity. ( x --> - ∞, y --> ∞ )

Out of the options given, the one As x --> ∞, then y --> - ∞ is true.

Answer:

-54 an

Step-by-step explanation:

Answer:

I'm guessing when it says "over the y-axis", it means to reflect it over the y-axis.

In that case, you would graph the points of the triangle, then flip them over the y-axis (change the x-values).

ex. R(-5,3)-R`(5,3)

Answer:

11x^2 + 10x + 5

Step-by-step explanation:

(4x^2 + 3x + 2) + (7x^2 + 7x + 3)

=> 4x^2 + 7x^2 + 3x + 7x + 2 + 3 ----> rearranging like terms together.

=> 11x^2 +10x + 5

Answer:

9) 15

Step-by-step explanation:

I can provide you with a table representation of the standard deviation based on assumptions for sample data in the online gaming industry. However, please note that the values presented will be hypothetical and may not reflect actual industry data.

In this hypothetical table, each row represents a specific variable related to the online gaming industry, and the corresponding standard deviation value is provided. The variables included here are player age, game session duration, number of in-game purchases, player engagement score, and monthly revenue.

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Answer:

A

C

D

Step-by-step explanation: Every other answer is wrong

Answer:

A, C,

Step-by-step explanation:

To find the total differential of the function w = e^y * cos(x) * z^2, we can take the partial derivatives with respect to each variable (x, y, and z) and multiply them by the corresponding differentials (dx, dy, and dz).

The total differential can be expressed as:

dw = (∂w/∂x) dx + (∂w/∂y) dy + (∂w/∂z) dz

Let's calculate the partial derivatives:

∂w/∂x =   \(-e^{y} * sin(x) * z^{2}\)

∂w/∂y =  \(e^{y} * cos(x) * z^{2}\)

∂w/∂z =  \(2e^{y} *cos (x)* z\)

Now, let's substitute these partial derivatives into the total differential expression:

\(dw = (-e^{y} * sin(x) * z^{2} ) dx + (e^{y}* cos(x) * z^{2} ) dy + 2e^{y} *cos (x)*z) dz\)

Therefore, the total differential of the function w = e^y * cos(x) * z^2 is given by:

\(dw = (-e^{y} * sin(x) * z^{2} ) dx + (e^{y} * cos(x) * z^{2} ) dy + ( 2e^{y} * cos(x) * z) dz\)

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The error in the calculation is in adding up the wrong numbers. The three friends paid a total of $27 for the room ($9 each) and gave the porter a $2 tip, making the total expenses $29. The extra dollar is not missing, but it was never part of the expenses in the first place. The mistake arises from adding up the $27 they paid for the room with the $2 tip they gave the porter, which gives $29. However, this sum includes the $3 they got back from the hotel, which should not be included in the expenses since they received it back.

Another way to think about it is to subtract the $3 they got back from the $30 they paid initially. This gives $27, which is the amount they actually spent on the room. Then, when they added the $2 tip for the porter, the total expenses for the weekend were $29, as expected.

So, the mistake is not in the missing dollar, but in adding up the wrong numbers.

Answer:

Step-by-step explanation:

-2

Answer:

(-3,-3)

Step-by-step explanation:

I think I think

Answer:

a = 9    b = 9    c = 18

Step-by-step explanation:

a+b = c

a+ b + c = 36        but we know   a+b = c   sub that in

  c    + c = 36

       c = 18             now  a + b = c    and a and b are the same

                                   so  a and b are = 9

Answer:

a is 9

b is 9

c is 18

Step-by-step explanation:

Let's list the information provided

a + b =c

a + b + c = 36

a=b

Knowing that a=b we can replace b with a in the equations

a+a is the same as 2a since a is being doubled

2a=c

Knowing this we can replace c with 2a

2a+2a=36

Now solve for a

\(2a+2a=36\\4a=36\\\frac{4a}{4} =\frac{36}{4} \\a=9\)

Now let's sub this value of a into the equations to see what the other values are

a=b

9=b

2a=c

2(9)=c

18=c

Answer:

The answer is A

Step-by-step explanation:

since JHG = 65, then the other two angles added together = 65. Therefore, I can just add what the two smaller angles are to equal 65. Solve for x, then plug x into one of the equations! JHI = 19, and GHI = 46

Step-by-step explanation:

d = 8 cm

r = 8 : 2

r = 4 cm

= π × 4 × 4 × 18

= 288π cm³

Answer:

(3, 0)

Step-by-step explanation:

So with the 2 equations you can either choose which to start with but you need to make the X or Y the opposite from the other equation.

1.

3x + y = 9 (keep as is)
x + 2y = 3 --> -3( x + 2y = 3) In this case I chose to make the X the opposite of each other

--

3x - 3x = 0 (forced to get rid of)

y - 6y = -5y (Get the -6 by -3 x 2)

9 - 9 (Get the -9 by -3 x 3)

Left with:

-5y = 0 (Divide both sides by -5 to get X alone)

y = 0

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

(Choose any ORIGINAL equation)

x + 2y = 3

x + 2(0) = 3 (substitute)

Left with:

x = 3  (x + 0 = 3)

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

Optional:

Chose the other equation (the opposite from above)

Substitute X and Y in 3x + y = 9

3(3) + (0) = 9

Left with: 9 = 9 (check)

Hope this helps!

Answer:

1st answer

Step-by-step explanation:

\(f(g(x)) = f(4x)=(4x)^2-8(4x)+4\\=16x^2-32x+4\)

Answer:

Step-by-step explanation:

(a) To sketch the graph of this sinusoid, we can use the given information. The graph will have peaks and valleys representing the maximum and minimum populations of foxes over time. At t = 0, the population is not specified, so we can start the graph at t = 2.9 years when the minimum number of 200 foxes occurred. At t = 5.1 years, the next maximum of 800 foxes occurred. The graph will be symmetric about the midpoint between these two points.

(b) To write an equation using the sine function, we need to find the amplitude, period, and phase shift of the sinusoid. The amplitude is half the difference between the maximum and minimum values, which is (800 - 200) / 2 = 300. The period is the time it takes for one complete cycle, which is the difference between the times of the two peaks, 5.1 - 2.9 = 2.2 years. The phase shift is the horizontal shift of the graph, which is the time at which the sinusoid starts, t = 2.9 years.

Therefore, the equation expressing the number of foxes as a function of time, t, is:

f(t) = 300 * sin((2π / 2.2) * (t - 2.9))

(c) To predict the population when t = 7 years, we substitute t = 7 into the equation:

f(7) = 300 * sin((2π / 2.2) * (7 - 2.9))

Simplifying the expression will give us the predicted population at t = 7.

(d) To find the values of t when the foxes were first endangered (population drops below 300), we need to determine the points where the sinusoid crosses the line y = 300. By analyzing the graph or solving the equation f(t) = 300, we can find the two non-negative values of t between which the foxes were first endangered.

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Answer:

\(\sf 9.6\:hours \:\: or \:\: 576\: minutes\)

Explanation:

\(\sf Time \ taken : \dfrac{Distance}{Speed}\)

Here given:

Applying formula,

\(\sf Time \ Taken = \dfrac{48}{5} = 9.6 \ hours = 576 \ minutes\)

Answer:

4th triangle

Step-by-step explanation:

The correct answer for the given problem above would be the fourth triangle. So here is the given solution: Since Triangle 1 is already given with a measurement of 50 inches, and 80% of 50 inches if 40. Triangle 2 then is 40 inches. 80% of 40 is 32, so triangle 3 is 32 inches, and then 80% of 32 is 25.6 inches so triangle 4 is 25.6 inches. Therefore, the triangle that will first have a side length of less than 29 inches is triangle 4.

hope this was helpful :)

Answer:

Step-by-step explanation: 1/6

The Probability of junior boys will be  \(\frac{1}{6}\) .

Probability is the ratio of the number of possible outcomes to the total number of outcomes.

We have,

Total number of boys = 12

Total Junior boys = 2

So,

Probability \(=\frac{number\ of\ possible\ outcomes }{total\ number\ of\ outcomes}\)

So,

P (Junior Boy) \(=\frac{number\ of\ junior\ boys}{total\ number\ of\ boys}\)

So,

P (Junior Boy) \(=\frac{2}{12}\)

i.e.

P (Junior Boy) \(=\frac{1}{6}\)

So,

The Probability of junior boys is \(\frac{1}{6}\) .

Hence, we can say that the Probability of junior boys will be  \(\frac{1}{6}\) .

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Answer:

13.2 g

Step-by-step explanation:

let x = grams sugar in a 200 ml glass

16.5 g sugar / 250 ml = x g sugar / 200 ml

x(250) = (16.5)(200)

x =  (16.5)(200) / (250) = 3300 / 250 = 13.2

Answer:  there are 13.2 g sugar in a 200 ml glass of juice

(i) The augmented matrix for the given system of linear equations is:

[1 2 0 2]

[0 1 -1 1]

[2 3 1 3]

(ii) To reduce the augmented matrix to reduced-row echelon form, we perform the following row operations:

R2 → R2 + (-1)*R1/2 (subtract half of R1 from R2)

R3 → R3 + (-2)*R1 (subtract twice of R1 from R3)

R3 → R3 + (-3)*R2 (subtract three times of R2 from R3)

R2 → R2/(-1) (divide R2 by -1 to make the leading entry 1)

The resulting reduced-row echelon form is:

[1 0 0 1]

[0 1 0 1]

[0 0 1 0]

(iii) The reduced-row echelon form has a leading 1 in each row and column, which indicates that the system has a unique solution. The solution is:

x = 1, y = 1, z = 0.

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