The regular cost of a music system is $80 999 . During a sale it was sold for $69,999 . Calculate the rate of discount ​​

Answer:

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∠ADC and ∠ABC subtend the same arc AC, hence ∠ABC is double the measure of ∠ADC:

The true statement is,

⇒ The joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.

Now, Based on the given table, the statement that is true about the joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.

Since, The given table shows that in the first column, under the ninth grade row, there are 18 students who prefer math and in the third column, under the 11th grade row, there are 15 students who prefer science.

Hence, There are no joint frequencies given that add up to 23, so the only true statement among the options is the first one.

Thus, The true statement is,

⇒ The joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.

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Answer answer is b dont trust the otha dude

Step-by-step explanation:

Hello !!

kᵃ x kᵇ = kᵃ⁺ᵇ

kᵃ ÷ kᵇ = kᵃ⁻ᵇ

4¹⁰ x 4⁵ ÷ 4⁹

= 4¹⁰⁺⁵ ÷ 4⁹

= 4¹⁵ ÷ 4⁹

= 4¹⁵⁻⁹

= 4⁶

We can begin by noting that 153° is the supplement of 27°, meaning that the sum of the two angles is 180°.

From this, we can use the fact that the sine function has a period of 360° to express the sine of 153° in terms of the sine of 27°. Specifically, we know that the sine of an angle and its supplement are equal, but the sine of an angle and its complement are not. Therefore, we can write: sin 153° = sin(180° - 27°) = sin 27°So we can say that sin 153° = t, since we were given that sin 27° = t. This result allows us to express the sine of 153° in terms of t, which was the goal of the problem.  In summary, we used the fact that 153° is the supplement of 27°, and the periodicity of the sine function, to express sin 153° in terms of sin 27° = t. This led us to the solution sin 153° = t, which provides a way of expressing the value of 153° in terms of t.

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A positive integer y is a whole number by definition, so we are essentially being asked how many positive integers there are. There are infinitely many positive integers, so the answer to the question is also infinity.

A positive integer y is a whole number if it isn't a bit or a numeric. In other words, it's a number that can be expressed without using  fragments or numbers, and can be written as a finite sum of positive integers. For  illustration, 2, 5, and 10 are whole  figures, but3/4,1.5, and √ 2 are not.   To determine how  numerous different values of y are whole  figures, we need to understand the  parcels of whole  figures.

Whole  figures have two main  parcels they're closed under addition and  addition. This means that when you add or multiply two whole  figures, the result is always a whole number. For  illustration, 2 3 =  5 and 2 × 3 =  6, both of which are whole  figures.   To find how  numerous different values of y are whole  figures, we can start with the  lowest possible value of y, which is 1.

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We need to convert the normal distribution of caffeine consumption to a standard normal distribution using the z-score formula. We can then look up the corresponding area under the standard normal distribution curve using a z-table.

Explanation:

To convert the normal distribution of caffeine consumption to a standard normal distribution, we use the z-score formula:

z = (x - μ) / σ

where x is the value we want to convert to a z-score, μ is the mean of the normal distribution, and σ is the standard deviation of the normal distribution.

In this case, we want to find the z-score for x = 240, μ = 240, and σ = 49:

z = (240 - 240) / 49 = 0

Since the z-score is 0, we can look up the area to the left of z = 0 in the standard normal distribution table. This area represents the percentage of adults who consume less than 240 mg of caffeine daily.

From the standard normal distribution table, we can see that the area to the left of z = 0 is 0.5000. Therefore, approximately 50% of adults consume less than 240 mg of caffeine daily.

So, the percent of adults who consume less than 240 mg of caffeine daily is 50%.

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Answer:4 is incorrect

Step-by-step explanation:

Answer:

4 is incorrect

Step-by-step explanation:

.

a) Yes, this provide strong evidence that more than 15% of college students in America have at least one sibling

b) Type of error might you have committed is type 1 error.

We can use the sample proportion of students with at least one sibling (20/100 = 0.2) to calculate a test statistic, which measures how far the sample proportion is from the null hypothesis. In this case, we can use a one-sample proportion z-test to calculate the test statistic:

z = (p1 - p) / √(p * (1 - p) / n)

where p1 is the sample proportion, p is the null hypothesis proportion, and n is the sample size.

Using the values from your question, we get:

z = (0.2 - 0.15) / √(0.15 * 0.85 / 100) ≈ 1.18

We can use a standard normal distribution to find the p-value, which is the probability of getting a test statistic as extreme as the one we observed, assuming the null hypothesis is true. The p-value can be calculated as:

p-value = P(Z > z)

where Z is a standard normal random variable.

Using a calculator or a table of standard normal probabilities, we can find that the p-value is approximately 0.12.

To make a decision about whether to reject or fail to reject the null hypothesis, we compare the p-value to a significance level, which is a threshold that we set to determine how much evidence we need to reject the null hypothesis.

The most common significance level is 0.05, which means that we are willing to accept a 5% chance of rejecting the null hypothesis when it is actually true.

In this case, the p-value (0.12) is greater than the significance level (0.05), so we fail to reject the null hypothesis. This means that we do not have strong evidence to conclude that more than 15% of college students in America have at least one sibling based on this sample.

Now, let's talk about the type of error that we might have committed when testing the hypothesis. In hypothesis testing, there are two types of errors: type I error and type II error.

A type I error occurs when we reject a true null hypothesis, and a type II error occurs when we fail to reject a false null hypothesis.

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Answer:

0.1 is the correct answer of this questions

Brian orders 1000 t-shirts, and demand is 850, resulting in a $2200 profit after expenses and revenue.

To calculate the payoff for Brian if he orders 1000 t-shirts and the demand is 850, we need to consider the costs and revenues involved.

Costs:

Brian purchases each t-shirt for $6, so the cost of ordering 1000 t-shirts is 1000 * $6 = $6000.

Additionally, Brian incurs a service fee of $300.

Revenues:

Brian plans to sell each t-shirt for $10.

If the demand is 850, he will be able to sell 850 t-shirts.

Revenue from t-shirt sales:

Revenue = Selling price per t-shirt * Number of t-shirts sold

Revenue = $10 * 850 = $8500

Payoff:

The payoff is calculated by subtracting the costs from the revenues.

Payoff = Revenue - Costs

Payoff = $8500 - ($6000 + $300)

Payoff = $8500 - $6300

Payoff = $2200

Therefore, if Brian orders 1000 t-shirts and the demand is 850, his payoff would be $2200. This represents the profit he would make after accounting for the costs of purchasing the t-shirts and the service fee, and the revenue generated from selling the t-shirts.

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The computations for the p-value of a hypothesis test about a population mean rely on the mathematical properties of the t-distribution and the sample statistics.

The p-value in statistics is the probability that the null hypothesis will be rejected if it is true. In hypothesis testing, p-values are utilized to determine whether or not the null hypothesis should be rejected. The p-value is calculated utilizing a test statistic that is based on the sample statistics and the assumptions of the null hypothesis.

The significance level, alpha, is usually set at 0.05 or 0.01 in hypothesis testing.A p-value of less than or equal to the significance level (alpha) indicates that the null hypothesis should be rejected

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The slope of the line that passes through the given points (2 12) and (6 11) is  -1/4.

Two points are given: (2, 12), (6, 11).

A line's "steepness" is quantified by a quantity called the slope, which is typically represented by the letter m. It is the adjustment of y for a unit adjustment of x.

We are aware that the formula for the slope of a line using two points is

m= y2 - y1 /x2 - x1

In this instance, x1 = 2, Y1 = 12, X2 = 6, Y2 = 11.

m = 11 - 12 / 6 - 2

m = -1/4

The slope is therefore -1/4.

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The probability that more than 72% of the sampled UCF students will vote in the presidential election is approximately 0.0475 or 4.75%.

To calculate the probability that more than 72% of the sampled UCF students will vote in the presidential election, we need to use the normal distribution approximation since the sample size is large.

First, we find the mean (μ) and standard deviation (σ) of the sampling distribution using the given population proportion (p) of 0.70 and the sample size (n) of 1250:

μ = p = 0.70

σ = √(p(1-p)/n) = √(0.70 * 0.30 / 1250) ≈ 0.012

Next, we need to standardize the desired proportion of more than 72% (0.72) using the z-score formula:

z = (x - μ) / σ

z = (0.72 - 0.70) / 0.012 ≈ 1.67

Now, we can find the probability using the standard normal distribution table or calculator. The probability that more than 72% of the sampled students will vote in the presidential election is the area under the curve to the right of the z-score of 1.67.

Using the standard normal distribution table or calculator, we find that the probability is approximately 0.0475.

Therefore, the probability that more than 72% of the sampled UCF students will vote in the presidential election is approximately 0.0475 or 4.75%.

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The length of the diameter of the circle is 50 inches.To find the length of the diameter of the circle, we can use the formula that relates the length of an arc to the angle it subtends and the radius of the circle.

The formula is: arc length = radius * angle

In this case, we are given that the arc length is 80 inches and the angle is 3.2 radians. Let's assume the radius of the circle is 'r'.

Plugging in the given values, we have:

80 = r * 3.2

To solve for 'r', we divide both sides of the equation by 3.2:

r = 80 / 3.2 = 25

So, the radius of the circle is 25 inches.The diameter of a circle is twice the radius, so:

Diameter = 2 * radius = 2 * 25 = 50 inches.

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The component form of the vector that describes the drummer's movement is <4, -3>.

The component form of a vector is given by the difference between the coordinates of the endpoints.

The initial point is (1, 4) and the final point is (5, 1).

Thus, the horizontal component is the difference between the x-coordinates, which is 5 - 1 = 4,

and the vertical component is the difference between the y-coordinates, which is 1 - 4 = -3.

Therefore, the component form of the vector that describes the drummer's movement is <4, -3>.

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Answer:

  24 grams

Step-by-step explanation:

You want the amount remaining of 195 grams of an isotope after 3 half-lives.

Each half-life leaves 1/2 of the amount there was at the beginning of that time period. After 3 half-lives, the amount is (1/2)(1/2)(1/2) = 1/2³ = 1/8 of the original amount.

  (195 g)(1/8) = 24.375 g ≈ 24 g

About 24 grams of the isotope will remain after 3 half-lives.

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Increasing the number of scores in the samples for an independent-measures t-statistic has the effect of increasing the likelihood of rejecting the null hypothesis while having little or no effect on measures of effect size.

As the sample-size increases, the t-statistic becomes more robust and accurate, which leads to a more precise estimate of the population parameter. This increased precision reduces the variability in t-statistic, which makes it easier to detect small differences between the means of the independent groups.

With a larger sample size, the t-statistic's sampling distribution approaches a normal-distribution, allowing for more reliable statistical inference. This results in a narrower confidence interval and a smaller p-value, increasing the likelihood of rejecting the null hypothesis when there is a true difference between the groups.

Therefore, increasing number of scores in samples enhances power of independent-measures t-statistic.

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6 x 1 = 6

6 x 2 = 12

6 x 3 = 18

6 x 4 = 24

6 x 5 = 30

6 x 6 = 36

6 x 7 = 42

6 x 8 = 48

6 x 9 = 54

So, 12, 18, 24, 30, 36, 42, and 48.

I assume "between" means we aren't including 6 and 54.

These tests would allow us to determine if the observed sample mean of $934 is significantly different from the claimed average of $1250, providing evidence to support or reject the alternative hypothesis.

To test the claim made by the IRS representative that the average deduction for medical care is $1250, we can formulate the null and alternative hypotheses as follows:

Null Hypothesis (H0): The average deduction for medical care is $1250.

Alternative Hypothesis (H1): The average deduction for medical care is lower than $1250.

In this case, the taxpayer who believes that the real figure is lower has collected a sample of 32 random families. The sample mean is $934, and the sample standard deviation is $619. The null hypothesis assumes that the average deduction is $1250, while the alternative hypothesis suggests that it is lower than $1250.

To statistically test these hypotheses, we can use a one-sample t-test or a z-test, depending on the sample size and whether the population standard deviation is known.

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Inequality for number line 1:  x ≤ -15

Inequality for number line 2:  ≥ 15

Inequality for number line 3: x ≥ 10

Inequality for number line 4: x ≤ -10

For the given number lines

We know that,

Inequalities specify the connection between two non-equal numbers. Equal does not imply inequality.

Typically, we use the "not equal symbol" to indicate that two values are not equal.

But several inequalities are utilized to compare the numbers, whether it is less than or higher than.

For number line 1:

Since the line is starting from -15 and tending toward infinity of negative

So inequality be x ≤ -15

For number line 2:

Since the line is starting from 15 and tending toward infinity of positive

So inequality be x ≥ 15

For number line 3:

Since the line is starting from 10 and tending toward infinity of positive

So inequality be x ≥ 10

For number line 4:

Since the line is starting from 10 and tending toward infinity of positive

So inequality be x ≤ -10

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To find the ratio of the volumes of two similar right cylinders, we need to know the ratio of their heights and radii. We can use the fact that the ratio of their surface areas is 36:121 to determine this. So, the ratio of the volumes of the two right cylinders is 216:1331.
Let the height and radius of the first cylinder be h1 and r1, respectively, and the height and radius of the second cylinder be h2 and r2, respectively. Then, we can write:
(2πr1h1)/(2πr2h2) = 36/121
Simplifying this equation, we get:
r1h1/r2h2 = 18/121
Since the cylinders are similar, we know that their ratios of heights and radii are equal. So, we can write:
r1/r2 = h1/h2 = x
Substituting this into our equation above, we get:
x^2 = 18/121
x = √(18/121) = 3/11
Therefore, the ratio of the volumes of the two cylinders is:
(r1^2h1)/(r2^2h2) = (r1/r2)^2(h1/h2) = (3/11)^2 = 9/121
In other words, the volume of the second cylinder is 121/9 times the volume of the first cylinder. Answer more than 100 words.
The ratio of the surface areas of two similar right cylinders is 36:121. To find the ratio of their volumes, we can use the fact that when two similar solids have a ratio of their surface areas (A1:A2), the ratio of their volumes (V1:V2) is the cube of the ratio of their corresponding linear dimensions (L1:L2).
First, let's find the ratio of the linear dimensions:
√(A1/A2) = √(36/121) = 6/11
Now, cube the ratio of the linear dimensions to find the ratio of their volumes:
(6/11)^3 = (6^3)/(11^3) = 216/1331
So, the ratio of the volumes of the two right cylinders is 216:1331.

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Answer:

Step-by-step explanation:

x^4+13^x^2+36=4x^3+36

4x+26x+36=4x^3+36

30x+36=12x+36

30x=12x

so,x=1

Answer:112 players

Step-by-step explanation:

To solve the problem, we can use the formula:

Total number of players = Number of teams × Number of players per team

Since there are 14 teams with 8 players each, we have:

Total number of players = 14 × 8 = 112

Therefore, there are 112 players in the soccer league.

The total number of ways to assign employees to desks is 720 (6!), and the number of favorable outcomes is 144. Therefore, the probability is 144/720 = 1/5.

The total number of ways to assign six employees to six desks is 6! (6 factorial), which equals 720. Now we need to find the number of ways that the married couple will not have adjacent desks.

First, we can treat the married couple as one entity, which means we have 5 entities to assign to 6 desks. There are 6 possible ways to choose the position of the married couple in the row. For each of these positions, we can then assign the other 4 entities to the remaining 4 desks in 4! ways.

Therefore, the total number of ways to assign employees to desks without the married couple having adjacent desks is 6 x 4! = 144.

The probability of this happening is the number of favorable outcomes (144) divided by the total number of possible outcomes (720), which is 144/720 = 1/5.



The probability that the married couple will not have adjacent desks when six new employees are randomly assigned to six desks that are lined up in a row is 1/5.

We calculated this probability by first treating the married couple as one entity and then finding the number of ways to assign the remaining entities to the desks without the married couple being adjacent to each other. The total number of ways to assign employees to desks is 720 (6!), and the number of favorable outcomes is 144. Therefore, the probability is 144/720 = 1/5.

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The area of the part of the plane 5x + 2y + z = 10 that lies in the first octant is 5 square units.

To find the area of the part of the plane 5x + 2y + z = 10 that lies in the first octant, we need to first find the coordinates of the three points where the plane intersects the coordinate axes.

Setting x = 0, we get 2y + z = 10, so the plane intersects the y-axis at the point (0, 5, 0).

Setting y = 0, we get 5x + z = 10, so the plane intersects the x-axis at the point (2, 0, 0).

Setting z = 0, we get 5x + 2y = 10, so the plane intersects the z-axis at the point (0, 0, 5).

We can see that the triangle formed by these three points lies entirely in the first octant.

To find the area of this triangle, we can use the formula for the area of a triangle given its vertices:

A = 1/2 * |x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)|

Plugging in the coordinates of the three points, we get:

A = 1/2 * |(0)(5 - 0) + (2)(0 - 5) + (0)(0 - 0)| = 1/2 * |-10| = 5

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Thus, the probability of being dealt a full house with an Ace of Hearts is 0.0457% (rounded to 4 decimal places).

To calculate the probability of being dealt a full house with an Ace of Hearts in a standard 52-card deck, we can use the following formula:

=(number of ways to get a full house with an Ace of Hearts) / (total number of 5-card poker hands)

The total number of 5-card poker hands is C(52,5) = 2,598,960.

To count the number of ways to get a full house with an Ace of Hearts, we need to consider the following:

We choose 2 of the remaining 3 Aces from the deck: C(3,2) = 3

We choose 2 of the 12 remaining ranks for the other 2 cards: C(12,2) = 66

For each rank, we need to choose 2 cards from the 4 of that rank: C(4,2) = 6

Therefore, the number of ways to get a full house with an Ace of Hearts is 3 x 66 x 6 = 1,188.

Thus, the probability of being dealt a full house with an Ace of Hearts is:

1,188 / 2,598,960 ≈ 0.000457 = 0.0457% (rounded to 4 decimal places)

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The rate at which the area of the circle is increasing at the moment when the circumference of the circle is 27/2 inches is 9 inches squared per second.

derivative of the circle's area with respect to time.

The area of a circle is given by the formula A = πr^2, where r is the radius of the circle.

Given that the radius is increasing at a constant rate of 2/3 inches per second, we can express this as dr/dt = 2/3.

We are also given that the circumference of the circle is 27/2 inches. The formula for the circumference of a circle is C = 2πr.

Plugging in the given circumference value, we have 27/2 = 2πr. Solving for r, we get r = (27/4π) inches.

Now, we can differentiate the area formula with respect to time:

dA/dt = d/dt (πr^2)

= 2πr(dr/dt)

Substituting the values, we have:

dA/dt = 2π(27/4π)(2/3)

= (27/2)(2/3)

= 9 inches squared per second

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Figure D, two lines that are the same distance apart :)

(a) Isla's trading cards are 125% of Lily's trading cards.

(b) Lily's trading cards are 80% of Isla's trading cards.

Given that,

There are 225 trading cards and Lily has 180 trading cards.

To calculate the percentage of Isla's trading cards compared to Lily's,

We can use this formula:

⇒ Isla's trading cards / Lily's trading cards x 100%

Plugging in the values we get:

⇒ (225 / 180) x 100% = 125%

Therefore,

Isla's trading cards are 125% of Lily's trading cards.

b) To calculate the percentage of Lily's trading cards compared to Isla's, we can use the formula:

⇒ Lily's trading cards / Isla's trading cards x 100%

Plugging in the values we get:

(180 / 225) x 100% = 80%

Therefore,

Lily's trading cards are 80% of Isla's trading cards.

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