what number is that which if increased by 20 of itself equals 48

To find the probability that the sample mean will lie between 78 and 81, we need to calculate the z-scores corresponding to these values and then use the standard normal distribution to determine the probability.

The Central Limit Theorem states that when the sample size is large enough, the distribution of sample means will be approximately normally distributed, regardless of the shape of the population distribution. In this case, since the sample size is 64 (which is considered large), we can assume that the sample mean follows a normal distribution.

To calculate the probability, we first convert the sample mean values of 78 and 81 into z-scores using the formula:

z = (x - μ) / (σ / √n)

where x is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.

For 78:

z = (78 - 80) / (10 / √64) = -2 / 1.25 = -1.6

For 81:

z = (81 - 80) / (10 / √64) = 1 / 1.25 = 0.8

We can then use a standard normal distribution table or a calculator to find the probability associated with these z-scores. The probability that the sample mean will lie between 78 and 81 is the difference between the cumulative probabilities corresponding to these z-scores.

P(78 ≤ x ≤ 81) = P(-1.6 ≤ z ≤ 0.8)

Using a standard normal distribution table or calculator, we can find the cumulative probabilities associated with these z-scores and calculate the probability.

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Rounded to the nearest whole dollar, the administrative fee for the year is $433.

To calculate the administrative fee for your variable annuity, you can use the following formula:
Administrative fee = (Average account value) × (Annual rate of administrative fees)
In this case, the average account value is $228,000 and the annual rate of administrative fees is 0.19 percent (0.0019 as a decimal).
Administrative fee = ($228,000) × (0.0019)
Administrative fee = $433.20

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Sabrina's basis in her partnership interest immediately after contributing a building with an adjusted basis of $80,000 and a fair market value of $100,000 would be $100,000.

When Sabrina contributes the building to the partnership, her basis in her partnership interest is equal to the fair market value of the contributed property. In this case, the fair market value of the building is $100,000. Therefore, immediately after the contribution, Sabrina's basis in her partnership interest would also be $100,000.

The basis of a partner's interest in a partnership is important for determining the partner's share of partnership profits, losses, and distributions. It represents the partner's initial investment in the partnership and is adjusted over time based on various factors such as additional contributions, share of partnership income or losses, and distributions received.

In this scenario, since the fair market value of the building exceeds its adjusted basis, Sabrina's basis in her partnership interest is equal to the fair market value of the contributed property. This means that if the partnership were to sell the building for its fair market value, Sabrina would not recognize any gain on the sale for tax purposes.

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To find the variance of the number of hours worked by a student, we first need to simplify the given numbers. The simplified numbers are 11, 9, 14, 12, 13, 8, 10, and 15.

Variance is a measure of how spread out the data is from the mean. To calculate the variance, we follow these steps:

1. Find the mean:

Add up all the simplified numbers and divide the sum by the total number of data points. In this case, the mean is (11 + 9 + 14 + 12 + 13 + 8 + 10 + 15) / 8 = 12.

2. Subtract the mean from each data point:

Take each simplified number and subtract the mean from it. The differences are as follows: -1, -3, 2, 0, 1, -4, -2, and 3.

3. Square the differences:

Square each of the differences obtained in the previous step. The squared differences are: 1, 9, 4, 0, 1, 16, 4, and 9.

4. Find the mean of the squared differences:

Add up all the squared differences and divide the sum by the total number of data points. In this case, the mean of the squared differences is (1 + 9 + 4 + 0 + 1 + 16 + 4 + 9) / 8 = 44 / 8 = 5.5.

Therefore, the variance of the number of hours worked by the student is 5.5. The variance indicates the average squared deviation from the mean, providing a measure of the spread or variability in the data set.

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The question that is best answered using a parametric design is: "Does one level of the independent variable result in an increase/decrease in levels of behavior when compared to another level of that independent variable, for given participants?"

A parametric design is characterized by manipulating and comparing different levels or conditions of an independent variable. It aims to determine whether there are significant differences between these levels in terms of the dependent variable. The design typically involves controlling extraneous variables and randomizing the assignment of participants to different conditions.

The question mentioned above aligns with the purpose of a parametric design as it seeks to compare the effects of different levels of the independent variable on behavior. By manipulating and systematically varying the independent variable while holding other factors constant, researchers can assess the impact of different conditions and determine if there are statistically significant differences in behavior between them.

The other answer choices provided do not explicitly involve comparing different levels or conditions of the independent variable, which is a key characteristic of a parametric design.

Therefore, the question that is best answered using a parametric design is: "Does one level of the independent variable result in an increase/decrease in levels of behavior when compared to another level of that independent variable, for given participants?"

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The industrialization-policy which is used by developing countries to resource allocation is : (a) export promotion.

The "Export-Promotion" is an industrialization policy which is used by "developing-countries" which emphasis on "comparative-advantage" principle as guide to resource-allocation.

The Comparative-advantage suggests that countries should focus on producing and exporting goods or services in which they have a relative advantage or lower opportunity cost compared to other nations.

Under export promotion, developing countries allocate resources to industries and sectors where they have a comparative advantage.

Therefore, the correct option is (a).

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The given question is incomplete, the complete question is

Which industrialization policy used by developing countries places emphasis on the comparative advantage principle as a guide to resource allocation?

(a) export promotion

(b) import substitution

(c) international commodity agreements

(d) Infant Industry promotion

(e) intra-industry trade practice

In one-year, the promised yields have risen to 7%, then the 1-year holding-period return was : (a) 0.61%.

The "Par-value" of the bond (face value) is = $1,000;

Coupon rate = 6% (annual payment coupon)

Yield at purchasing time is = 6%

Yield after 1 year = 7%

Step 1: Calculate the present value of the redeemable value:

We know that PVIF at 7% for 7 years is 0.623,

So, Present value of redeemable value = (Par value) × PVIF = $1,000 × 0.623 = $622.75,

Step 2: Calculate the present value of coupon payments:

Coupon payment = (Coupon rate)×(Par value) = 6% × $1,000 = $60,

We know that PVAF at 7% for 7 years is 5.389,

So, Present value of coupon payments = (Coupon payment) × (PVAF) = $60 × 5.389 = $323.36,

Step 3: Calculate the price of bond after 1 year:

Price of bond = Present value of redeemable value + Present value of coupon payments,

Substituting the values,

We get,

Price of bond = $622.75 + $323.36 = $946.11

Step 4: Calculate the 1-year holding-period return:

Holding return = (Price in next year + Coupon interest - Price in current year) / Price in current year,

Holding return = ($946.11 + $60 - $1,000) / $1,000

Holding return = $6.11 / $1,000

Holding return = 0.00611 = 0.61%.

Therefore, the correct option is (a).

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The given question is incomplete, the complete question is

You buy an 8-year $1,000 par value bond today that has a 6% yield and a 6% annual payment coupon. In 1 year promised yields have risen to 7%. Your 1-year holding-period return was

(a) 0.61%

(b) -5.39%

(c) 1.28%

(d) -3.25%

( ) In the same OSM, all pages must have the same size. - False

( ) In the same OSM, all segments must have the same size. - False

( ) Internal fragmentation is a problem of paging. - True

( ) External fragmentation is a problem of segmentation. - True

( ) Paging and segmentation cannot co-exist in the same OSM - False

In an Operating System Memory (OSM), all pages do not have to have the same size. Pages can have different sizes depending on the system's memory management scheme, such as demand paging or memory segmentation.

Similarly, segments in the same OSM do not have to have the same size. Segmentation allows for variable-sized memory segments based on program requirements.

Internal fragmentation refers to wasted memory within a single memory block due to allocation granularity. It is typically associated with paging, where fixed-size pages can lead to inefficient memory utilization.

External fragmentation refers to unallocated or unusable memory scattered throughout the system. It is more commonly associated with memory segmentation, where varying sizes of memory segments can result in fragmented memory space.

Paging and segmentation can coexist in the same OSM. Many operating systems use a combination of both techniques, known as segmented paging or hybrid memory management, to leverage the advantages of each method and optimize memory allocation.

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Monique's father suggests that she practice her balance before attempting to surf in a town where surfing is popular. This will help her prepare for the physical demands of surfing and improve her chances of success.

Surfing requires good balance and stability to navigate the waves effectively. By practicing her balance, Monique can develop the core strength and stability necessary to maintain her equilibrium while riding the surfboard.

One activity that can help improve balance is yoga. Yoga poses and sequences require concentration, body awareness, and the engagement of various muscles to maintain balance. Practicing yoga can enhance Monique's proprioception, body control, and stability, which are essential for surfing.

Additionally, activities such as skateboarding, paddleboarding, or even simply standing on one leg can also be beneficial for improving balance and preparing Monique for the challenges of surfing.

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The answer to the question is option B: "The slot machine didn't give me a winning amount for over an hour, so chances now are going to be that I hit the jackpot soon."

The first paragraph explains how slot machines and cell phones can create a sense of excitement and false hope, leading to addictive behaviors. It highlights the manipulation by app designers and the negative impact on interpersonal relationships. The second paragraph asks for an example of the Gambler's Fallacy.

The answer to the question is option B: "The slot machine didn't give me a winning amount for over an hour, so chances now are going to be that I hit the jackpot soon." This statement reflects the Gambler's Fallacy, which is the belief that previous outcomes will influence future outcomes in a game of chance. In this case, the person assumes that because they haven't won for a while, their chances of hitting the jackpot have increased. However, each spin of the slot machine is independent and has no connection to previous outcomes. The Gambler's Fallacy is a common misconception that can lead to risky and irrational behavior in gambling situations.

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Governments may restrict trade for several reasons, despite the general consensus among economists that it is detrimental to trade and reduces government efficiency. One primary reason is to protect domestic industries and jobs from foreign competition.

Trade restrictions such as tariffs and quotas can shield domestic producers from international competition, allowing them to maintain market share and employment levels. Governments may also impose trade restrictions for strategic reasons, such as protecting national security interests or preventing the outflow of critical resources.

Trade restrictions refer to government-imposed barriers and regulations that limit the flow of goods and services across international borders.

These restrictions can take various forms, such as tariffs, quotas, embargoes, and regulatory barriers. The reasons for implementing trade restrictions can vary depending on the specific circumstances and goals of the government.

Additionally, political considerations and pressure from special interest groups can influence trade policy decisions. While economists emphasize the benefits of free trade, governments often face complex trade-offs between economic efficiency, domestic interests, and political considerations when formulating trade policies.

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Answer:

z = 142°

Step-by-step explanation:

the bearing of B from A is the measure of the clockwise angle from the north line (N) at A to B

given the bearing of B from A is 218°

the angle around A is 360° , that is

z + 218° = 360° ( subtract 218° from both sides )

z = 142°

The position vector of point C which divides the line segment AB internally is  determined as 1.75i + 3j.

The position vector of point C is calculated using the following formula as shown below.

C = (mb + na) / (m + n)

where;

The ratios and position vector A and B is given as;

m = 3,  n = 1.

a = i - 3j

b = 2i + 5j

The position vector of point C is calculated as follows;

r = (3 (2i + 5j) + 1(i - 3j)) / (3 + 1)

= (6i + 15j + i - 3j) / 4

= (7i + 12j) / 4

= 1.75i + 3j

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A sequence of two instructions that copies bits 0-5 from AL to bits 0-5 in BL is Clear bits 0-5 in BL then, Copy bits 0-5 from AL to bits 0-5 in BL.

To copy bits 0-5 from AL to bits 0-5 in BL while clearing bits 6-7 in BL, you can use the following sequence of two instructions:

Clear bits 0-5 in BL:

AND BL, 0xC0

This instruction applies a bitwise AND operation between the value in BL and the bitmask 0xC0, which has bits 6-7 cleared (set to 0). This operation clears bits 0-5 in BL while preserving the values of bits 6-7.

Copy bits 0-5 from AL to bits 0-5 in BL:

AND AL, 0x3F

This instruction applies a bitwise AND operation between the value in AL and the bitmask 0x3F, which has bits 6-7 cleared (set to 0) and bits 0-5 preserved (set to 1). This operation clears bits 6-7 in AL while preserving the values of bits 0-5.

After executing these two instructions, bits 0-5 in BL will hold the same values as bits 0-5 in AL, bits 6-7 in BL will be cleared, and AL will remain unchanged.

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Answer:

4th quadrant

Step-by-step explanation:

If you were to imagine a quadrant plane you would see a plus. Quadrant one is two positives. Quadrant two is one negative and then one positive. Quadrant 3 is two negatives. So, its quadrant 4 because it is one positive and one negative.

To be at least 70% sure of knowing the identity of at least one missing card from a deck missing seven out of 52 cards, you would need to remove and look at 22 cards.

When cards are removed from the deck without replacement, the probability of identifying a missing card increases with each card drawn. In this case, since the deck is missing seven cards, there are 45 cards remaining in the deck. To calculate the number of cards needed to reach at least 70% certainty, we can use the concept of complementary probability.

The complementary probability is the probability of not knowing the identity of any missing card. To be at least 70% sure, the complementary probability should be less than or equal to 30%. We need to find the smallest value of n (number of cards drawn) for which the probability of not knowing any missing card is less than or equal to 30%.

By using the formula for the complementary probability, we can calculate the number of cards needed to reach the desired certainty. In this case, n = 22 is the minimum number of cards you need to remove and look at before you can be at least 70% sure of knowing the identity of at least one of the missing cards.

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The statement in option B is a correlation rather than a causation

A statistical association or relationship between two or more variables is referred to as correlation. It gauges how closely variations in one variable are related to variations in another. Even if two variables are highly connected, this does not necessarily imply that one causes the other because correlation does not imply causation.

When two variables are in a cause-and-effect connection, it is said that there is causation since changes in one variable will inevitably result in changes in the other. More rigorous evidence is needed to prove causation, such as experimental designs, control groups, and deliberate manipulation of variables.

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With a smaller error bound, the confidence interval narrows, increasing confidence in the estimated mean age with a more precise range of values.

To construct a 95% confidence interval for the true mean age of Winter Foothill College students, we need to calculate the margin of error and then determine the interval.

First, let's calculate the standard error, which is the standard deviation divided by the square root of the sample size:

Standard Error = (Population Standard Deviation) / sqrt(sample size)

Standard Error = 15 / sqrt(25)

Standard Error = 15 / 5

Standard Error = 3

The margin of error is then calculated by multiplying the standard error by the appropriate critical value from the t-distribution. For a 95% confidence level, the critical value is 2.063 (assuming a sample size of 25 and using a t-distribution).

Margin of Error = (Critical Value) * (Standard Error)

Margin of Error = 2.063 * 3

Margin of Error = 6.189 (rounded to three decimal places)

To calculate the confidence interval, we subtract and add the margin of error to the sample mean:

Confidence Interval = Sample Mean ± Margin of Error

Confidence Interval = 30.4 ± 6.189

Confidence Interval = (24.211, 36.589)

The area in each tail is determined by the confidence level. In this case, it's a 95% confidence interval, so there is 2.5% of the total area in each tail.

In one complete sentence, the 95% confidence interval means that we are 95% confident that the true mean age of Winter Foothill College students falls within the interval of (24.211, 36.589).

If the confidence level were reduced to 90%, the critical value from the t-distribution would change. With a smaller critical value, the margin of error would decrease.

Therefore, the error bound would become smaller, resulting in a narrower confidence interval. This means that we would have a higher level of confidence in the estimated mean age, but the interval would be less wide, providing a more precise range of potential values for the true mean age.

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The gain or loss on the sale of the batting cage is $0. The selling price is equal to the net book value, indicating that Strike Company sold the equipment for its carrying amount without incurring a gain or loss on the transaction.

To calculate the gain or loss on the sale of the batting cage by Strike Company, we can subtract the net book value (original cost - accumulated depreciation) from the selling price. Here are the calculations:

Original cost: $211,850

Accumulated depreciation: $31,778

Net book value: Original cost - Accumulated depreciation = $211,850 - $31,778 = $180,072

Selling price: $180,072

To determine the gain or loss, we subtract the net book value from the selling price:

Gain or Loss = Selling Price - Net Book Value

Gain or Loss = $180,072 - $180,072 = $0

Based on the calculations, the gain or loss on the sale of the batting cage is $0.

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The daily interest rate for May 23 on this account, rounded to the nearest millionths place, is approximately 0.000990

To calculate the daily interest rate for an account that pays 9.5% interest, compounded daily, we can use the following formula:

Daily interest rate = (1 + Annual interest rate)^(1/Number of compounding periods) - 1

In this case, the annual interest rate is 9.5% and there are 91 days in the quarter, which will be considered as the number of compounding periods.

Let's calculate the daily interest rate:

Daily interest rate = (1 + 0.095)^(1/91) - 1

Using a calculator, the daily interest rate, rounded to the nearest millionths place, is approximately 0.000990674.

Therefore, the daily interest rate for May 23 on this account, rounded to the nearest millionths place, is approximately 0.000990.

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The equation you provided, -3 - 4 = -4 - 3, does not imply that subtraction of integers is commutative. In fact, subtraction of integers is not a commutative operation.

The equation you presented demonstrates the property of additive inverse, where the negative of a number is the additive inverse of that number. In this case, both sides of the equation result in the same value (-7), but it does not illustrate commutativity.

To show an example of a commutative operation, we can look at addition of integers:

For example:

3 + 4 = 7

4 + 3 = 7

In this case, the order of the integers being added does not change the result, illustrating the commutative property of addition.

However, subtraction does not exhibit this property. For instance:

3 - 4 = -1

4 - 3 = 1

In this case, swapping the order of the subtraction operation changes the result, indicating that subtraction is not commutative.

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Je vais décrire les étapes pour tracer les figures demandées à main levée et indiquer les informations pertinentes sur chaque figure. Cependant, je ne suis pas en mesure de les tracer en "vraie grandeur" ici, car je ne peux fournir que des représentations textuelles. Voici les étapes pour les deux figures :

1) Figure IFGH :

2) Figure RSTU de centre O :

Assurez-vous de tracer les segments et les angles avec soin et de les proportionner selon les dimensions indiquées.[tex][/tex]

The value of the chi-square test statistic and the degrees of freedom for this test is A. χ‑2 = 7.47, df = 4

The chi-square test statistic is calculated as follows:

χ² = Σ(O - E)² / E

The expected counts are calculated as follows:

E = N * p

In this case, the total sample size is 150, so the expected counts are:

City: 50 * 0.25 = 12.5

Rural: 50 * 0.50 = 25

Suburbs: 50 * 0.25 = 12.5

The chi-square test statistic is then:

χ² = (10 - 12.5)² / 12.5 + (60 - 25)² / 25 + (40 - 12.5)² / 12.5

= 7.47

The degrees of freedom for this test are the number of categories minus one, which is 5 - 1 = 4.

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The point on the graph where the tangent plane is parallel is (52, 52, -5382).

What is the tangent plane?

The surface that contains all tangent lines of the curve at a point, $P$, that lies on the surface and passes through the point is represented by the tangent plane. We discovered earlier in our talks of derivatives and tangent lines that we can use tangent lines to mimic the behavior of a graph. We may employ tangent planes for a similar reason now that we're working with multivariable functions and three-dimensional coordinate systems.

Here, we have

Given: Let P be the tangent plane to the graph of g(x, y) = 26 – 13x² – 26y² at the point (4, 2, –286). Let f(x, y) = 26 – x² - y².

We have to find the point on the graph where the tangent plane is parallel.

Let P be the tangent plane to the graph z = g(x, y) = 26 – 13x² – 26y² at the point (4, 2, –286).

φ(x,y,z) = 13x² + 26y² + z - 26

Δφ = 26xi + 52yj + k

Δφ(4, 2, –286) = 104i + 104j + k

Then,

P: 104(x-4) + 104(y-2)+1(z+286) = 0

104x + 104y + z = 338...(1)

Now, Let

ψ(x,y,z) =  x² + y² + z - 26

Δψ = 2xi + 2yj + k

Let (x₀,y₀,z₀) be the point of the graph z = f(x,y) = 26 – x² - y² where the tangent plane in the plane is parallel to equation (1).

Δψ (x₀,y₀,z₀)  =  (2x₀,2y₀,1)

= 2x₀/104 = 2y₀/104 = 1/1

x₀ = 52 = y₀

Now, z₀ = 26 – x₀² - y₀² = 26 – 52² - 52²= -5382

Hence,  the point on the graph where the tangent plane is parallel is (52, 52, -5382).

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The situation which is modeled by linear-function is (c): "An amusement-park allows 50 people to enter every 30 minutes."

A "Linear-Function" represents a relationship that has constant-rate of change. In this case, the number of people entering the amusement-park increases by a constant amount of 50 every 30 minutes. The rate of change is consistent, and it can be expressed as a linear function.

The Option (a) cannot be modeled by a linear function because the population of bacteria triples every day, which represents exponential-growth rather than a linear relationship.

The Option (b) cannot be modeled by a linear function either because the value of a cell phone depreciates at a constant rate of 3.5% each year, which also represents exponential decay.

The Option (d) does not follow a linear pattern either. In a baseball tournament, the number of teams gets halved after each round, resulting in an exponential decrease rather than a linear relationship.

Therefore, the correct option is (c).

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The given question is incomplete, the complete question is

Which situation can be modeled by a linear function?

(a) The population of bacteria triples every day,

(b) The value of a cell phone depreciates at a rate of 3.5% each year,

(c) An amusement park allows 50 people to enter every 30 minutes,

(d) A baseball tournament eliminates half of the teams after each.

The amygdala is "brain-structure" which is less influenced by reflection, such as registering more primal-emotions, which includes fear and anxiety, correct option is (b).

The "amygdala" is a brain structure that plays a crucial role in processing primal emotions, particularly fear and anxiety. It is less influenced by reflection or higher-level cognitive processes.

The amygdala is responsible for detecting and responding to potential threats and triggers the body's immediate emotional and physiological responses, such as the fight-or-flight response.

It acts as an emotional alarm-system, rapidly assessing and generating emotional reactions to stimuli.

Therefore, Option is (b) is correct.

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The given question is incomplete, the complete question is

The _____ is the brain structure less influenced by reflection, such that it registers more primal emotions, including fear and anxiety.

(a) hypothalamus

(b) amygdala

(c) hippocampus

(d) cortex

Answer:

2.5

Step-by-step explanation:

slope is rise/run, (y2-y1)/(x2-x1)

We have two points clearly given to us on this graph so let's just use those.

(-1,-3) and (1,2)

= (-3-2)/(-1-1)

=(-5)/(-2)

=2.5