hillary took a photograph of her house, which has an actual height of 28.5 feet. if the house measures 3.6 inches tall in the photograph, what is the scale factor?

Law of Cosines Of A Triangle -GIVEN: C (the degree) 20, 22,18 (the base). C is 26.5 degrees.

To solve for the angle C using the law of cosines, we use the formula:

[tex]c^2 = a^2 + b^2[/tex] - 2ab cos(C)

where c is the angle C's opposite side.

Substituting the given values, we get:

[tex]18^2 = 20^2 + 22^2[/tex] - 2(20)(22)cos(C)

324 = 1048 - 880cos(C)

880cos(C) = 724

cos(C) = 724/880

C = [tex]cos^{(-1)}[/tex](724/880)

C ≈ 26.5 degrees

Therefore, the measure of angle C is approximately 26.5 degrees.

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Option A, 100 is the new area.

Explanation:
Let's assume that the length of the square is x. Then, according to the problem, the width of the square is one-fifth as long as the length, which means the width is x/5. The area of the square is given as 500, which means:

x * x = 500

x^2 = 500

x = sqrt(500) = 10 * sqrt(5)

So, the length of the square is 10 * sqrt(5). Using this information, we can find the width:width = x/5 = (10 * sqrt(5))/5 = 2 * sqrt(5)

Now we can find the new area of the square by multiplying the new length and width:new area = (2 * sqrt(5)) * (10 * sqrt(5)) = 100

Therefore, the new area of the square is 100, which is option A.

A group of observations measured at successive time intervals is known as a(n) time series. So, correct option is C.

A time series is a collection of observations or measurements that are taken at regular intervals over time. These observations can be of any variable that changes over time, such as stock prices, weather patterns, or population growth. Time series analysis is a statistical technique used to understand and interpret the patterns and trends in such data.

The data in a time series can be analyzed to identify trends, seasonal variations, and other patterns that may exist over time. These patterns can be used to develop forecasts and make predictions about future values of the variable being measured.

On the other hand, an additive time series model is a specific type of model used to analyze time series data. It involves decomposing a time series into its underlying components, such as trend, seasonality, and random fluctuations, and modeling each component separately.

This approach can help to improve the accuracy of forecasts and predictions based on the time series data.

In summary, a time series is a collection of observations measured at successive time intervals, while an additive time series model is a specific type of statistical model used to analyze and forecast time series data.

Therefore, Option C is correct answer.

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An exponential model for the worth of the savings account is [tex]W = 1250(1.045)^t[/tex]

The worth predicted by the exponential model is greater than predicted by the linear model at the end of 2020 by $131.2.

In Mathematics, an exponential function can be modeled by using the following mathematical equation:

[tex]f(x) = a(b)^x[/tex]

Where:

Based on the information provided about the savings account, we would determine the growth rate as follows;

[tex]W = P_{0}e^{rt}[/tex]

Growth rate, r = 1/(1 - 0)ln(1250/1306)

Growth rate, r = ln(1250/1306)

Growth rate, r = 0.0438

In the form [tex]W = a(b)^t[/tex], the required exponential function is given by;[tex]W = 1250(1.045)^t[/tex]

Years = 2020 -2010 = 10 years.

From the linear function, we have:

W = 56t + 1250

W = 56(10) + 1250

W = $1,810.

From the exponential function, we have:

[tex]W = 1250(1.045)^t\\\\W = 1250(1.045)^{10}[/tex]

W = $1,941.2

Difference = $1,941.2 - $1,810

Difference = $131.2.

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Option C is a system of inequalities that best fits the figure.

To find a system of inequalities, find the inequality represented by each row.

First, let's determine the slope. You can use the gradient formula to do this.

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

Taking (0, 1) and (1, 3) and plugging them into the gradient equation gives:

[tex]m=\frac{3-1}{1-0}[/tex]

[tex]m=\frac{2}{1} =2[/tex]

To write the equation for the red line, we can use the intercept form of the slope.

y=mx+b

The y-intercept of the red line is (0, 1). Therefore, it is already established that b = 1 and m = 2.

y=2x+1

Note that the shaded area is below the red line. Therefore y is less than the expression.

[tex]y\leq 2x+1[/tex]

let's find the slope again. Two points are available: (0, 2) and (2, 3). with this:

m=[tex]\frac{3-2}{2-0} =\frac{1}{2}[/tex]

So the slope is 1/2. Note that the y-intercept is (0, 2). So replace m with 1/2 and b with 2.

[tex]y=\frac{1}{2}x+2[/tex]

y is greater than the formula because the shaded area is above the blue line. The sign is above because it is shaded. So the formula is:

[tex]y\geq \frac{1}{2}x+2[/tex]

Hence the inequalities are:

[tex]y\leq 2x+1\\y\geq \frac{1}{2}x+2[/tex]

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Answer:

Step-by-step explanation:

Its answer A.

y < 2x + 1

y > 1/2 x + 2

The probability that 10 or more of 15 marketing personnel are extroverts is 0.719.

Since 80% of all marketing personnel are extroverts, the probability of any single marketing personnel being an extrovert is 0.8. The probability that 10 or more marketing personnel at the party of 15 are extroverts can be calculated using the Binomial Distribution formula:

P(X>=10) = 1 - [P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7) + P(X=8) + P(X=9)]

P(X>=10) = 1 - [15C0*0.80*0.215 + 15C1*0.81*0.214 + 15C2*0.82*0.213 + 15C3*0.83*0.212 + 15C4*0.84*0.211 + 15C5*0.85*0.210 + 15C6*0.86*0.29 + 15C7*0.87*0.28 + 15C8*0.88*0.27 + 15C9*0.89*0.26]

P(X>=10) = 0.719

Therefore, 0.79 is the probability that 10 or more of the 15 marketing personnel at the party are extroverts.

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So according to the question Counseling and employment readiness programs are examples of rehabilitation.

Explain rehabilitation?

The English words "re," which means "once more," and "habitia," which denotes capacity, were combined to create the word rehabilitation. As a result, we can conclude that the lexical significance of the word "rehabilitation" is "recapturing the capacity."

The counseling and employment readiness program are example of rehabilitation only.

Hence, rehabilitation entails providing a sincere or simple-minded person with the necessary assistance in order to enable him to resume living a normal life. For instance, medical assistance, financial assistance, business assistance, etc.

As accidents continue to occur everywhere, rehabilitation has a huge range of applications. Accidents can occur anywhere and at any time, making it challenging to eliminate them.

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To calculate the probability of two separate events using the ratio method, we must first understand the odds associated with each event. The odds are expressed as a ratio, with the first number representing the chances of success and the second number representing the chances of failure. For example, the odds of an event happening might be 3:2, which indicates that there is a 3/5 chance of success.

Once the odds for each event are known, we can calculate the probability of both events occurring by multiplying the odds of each event together. So, for example, if the odds of Event A are 3:2 and the odds of Event B are 4:5, the probability of both events occurring is 3/2 * 4/5 = 6/10. This means that there is a 6 in 10 chance of both events occurring.

To sum up, calculating the probability of two separate events using the ratio method is fairly simple. Just look at the odds associated with each event and multiply them together to get the probability of both events occurring.

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Lu Chao recited 67,890 digits of pi in 24 hours and 4 minutes using the memory palace technique

Lu Chao, a Chinese engineer, set a new world record by reciting 67,890 digits of pi in 24 hours and 4 minutes on November 20, 2005. This achievement required an incredible amount of focus, memory, and mental discipline. Chao utilized a technique called the "memory palace," in which he associated each digit with a specific image and placed those images in a familiar location in his mind.

This allowed him to recall the digits in order with remarkable accuracy. Chao's achievement demonstrates the incredible potential of the human mind and the power of memory techniques to accomplish seemingly impossible feats.

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The percentage of the area under the density curve where x is less than 2 is 50%.

What is percentage?

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100. The proportion therefore refers to a component per hundred.

To find the percentage of the area under the density curve where x is less than 2, we need to find the area under the curve to the left of x = 2 and divide it by the total area under the curve.

To calculate the area under the curve to the left of x = 2, we can break it up into two parts: the rectangular area to the left of x = 2 and the triangular area above it.

The rectangular area has a width of 2 and a height of 0.2, so its area is 2 × 0.2 = 0.4.

The triangular area has a base of 2 and a height of 0.2 - 0 = 0.2, so its area is (1/2) × 2 × 0.2 = 0.2.

Therefore, the total area under the curve to the left of x = 2 is 0.4 + 0.2 = 0.6.

To find the total area under the curve, we can calculate the area of the rectangle with width 6 and height 0.2, which is 6 × 0.2 = 1.2.

So the percent of the area under the density curve where x is less than 2 is -

(0.6 / 1.2) × 100% = 50%

Therefore, the area under curve is obtained as 50%.

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⇒First take out the highest common factor 2 form the quadratic equation and divide each and every term of that equation by that common factor.

⇒Factorise the equation and equate the factors of the equation to 0 and solve for the unknown variable x.

⇒Below are the steps on solving for the unknown variable.

[tex]2(x^{2} -14x+49)=0 \\\frac{2(x^{2} -14x+49)}{2} =\frac{0}{2} \\x^{2} -14x+49=0\\(x-7)(x-7)=0\\x-7=0\\x=7[/tex]

The recursive formula that represents the given sequence is:

(B) an = -44aₙ₋₁ - 2

Any term of a series can be defined by its preceding term in a recursive formula (s).

For instance: An arithmetic series has the recursive formula a = an-1 + d.

An = An-1r is the recursive formula for a geometric sequence.

Because each phrase, an, goes back to the preceding term, an1, the formula an=2an1+3 is recursive.

According to this equation, any term we want is equal to two times the previous term plus three.

This sequence's first three terms are 4, 11, and 25.

So, we have the sequence:

-44, -46,-48, ...

Now, we have d that is:

= -48 - (-46)

= -48 + 46

= -2

The 1st term would be: a1 = -44

Then, the correct formula would be: an = -44aₙ₋₁ - 2

Therefore, the recursive formula that represents the given sequence is:

(B) an = -44aₙ₋₁ - 2

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Defining a confidence interval is important in analyzing a dataset to test the validity of data. The choice of population parameter, test statistic, and confidence interval depends on the type of data being analyzed and the level of confidence required by the researcher.

When analyzing a dataset, it is important to determine the confidence interval to test the validity of the data. The confidence interval measures the precision of an estimate and indicates the range in which the population parameter is likely to exist.

There are several types of datasets where defining a confidence interval would be important for testing validity of data, some of them include;

1. Medical research: In medical research, researchers gather data to examine how a treatment plan affects a group of people. They can define a confidence interval to determine the range of possible outcomes. They use the test statistic to help them determine how significant the results are.

2. Business Data: When analyzing business data, defining a confidence interval is crucial to determine the success rate of a marketing campaign, sales data, or employee turnover. It allows the business to assess their performance and make data-driven decisions.

3. Political Polling: When conducting political polls, defining a confidence interval is necessary to determine the reliability of the data. It helps the pollsters to estimate the likely outcome of the election and the level of confidence that can be placed in the results.

When analyzing a dataset, it is essential to determine which population parameter and test statistic to use. The population parameter is the numerical value that describes the entire population. It can be the mean, proportion, variance, or standard deviation. The test statistic is used to determine if the population parameter is within the confidence interval, or if it lies outside the interval. The choice of population parameter and test statistic depends on the type of data being analyzed.

The confidence interval to choose depends on the level of confidence required by the researcher. The commonly used confidence intervals are 90%, 95%, and 99%. The level of confidence chosen by the researcher determines the size of the interval. The higher the confidence level, the wider the confidence interval. The researcher should choose a confidence interval that is wide enough to contain the population parameter, but not too wide to reduce the precision of the estimate.

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Answer:

True.

explanation:

The data from the Florida Crash Reports and annual registrations and licensure numbers indicate that in 2004, 416 motorcyclists  died in Florida while in 2008 the number reached 532.In 2008, 55 % of the fatalities were wearing helmets, while 35% were with no helmet. The Florida Rider Training Program (FRTP) is an effort established to educate the public on fatalities in motor cycle fatalities.

When taking data at different inclined plane angles, it will have an effect on the final results specifically the uncertainties because of gravitational force.

       This is because as the angle of the plane increases, the gravitational force acting on the object decreases, while the force of friction increases.

         Therefore, by taking data at different inclined-plane angles, the uncertainties in the results will be affected. The uncertainties will increase as the angle of the plane increases because it becomes more difficult to measure the gravitational force acting on the object. In order to minimize uncertainties, it is recommended to take measurements at several different angles and take an average of the results.

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[tex]~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\dotfill & \$ 850\\ P=\textit{original amount deposited}\dotfill & \$500\\ r=rate\to 10\%\to \frac{10}{100}\dotfill &0.10\\ t=years \end{cases} \\\\\\ 850 = 500[1+(0.1)(t)] \implies \cfrac{850}{500}=1+0.10t\implies \cfrac{17}{10}=1+0.10t \\\\\\ \cfrac{17}{10}-1=0.10t\implies \cfrac{7}{10}=0.10t\implies \cfrac{7}{(10)(0.10)}=t\implies 7=t[/tex]

Yes

The logarithm function is continuous for all x>0. Its derivative is 1/x and r12 ln x dx = x ln x - x + c.

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If a research company claims that more than 55% of americans regularly watch public access television, the test statistic for the population proportion is 1.61.

To calculate the test statistic for the population proportion, we first need to set up the null and alternative hypotheses. Let p be the true proportion of Americans who regularly watch public access television.

H0: p ≤ 0.55 (null hypothesis)

Ha: p > 0.55 (alternative hypothesis)

We use a one-tailed test with α = 0.05 level of significance.

Next, we calculate the sample proportion:

p' = 255/425 = 0.60

Then, we calculate the standard error of the proportion:

SE = √(p'(1-p')/n) = √(0.60*0.40/425) ≈ 0.031

Finally, we calculate the test statistic:

z = (p' - p0)/SE = (0.60 - 0.55)/0.031 ≈ 1.61

where p0 is the value of the proportion under the null hypothesis.

The test statistic is approximately 1.61. To determine whether this value provides evidence to reject the null hypothesis, we compare it to the critical value of the z-distribution at α = 0.05 level of significance.

For a one-tailed test with a significance level of 0.05, the critical value is 1.645. Since our test statistic is less than the critical value, we fail to reject the null hypothesis.

Therefore, we do not have sufficient evidence to support the claim that more than 55% of Americans regularly watch public access television.

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The quantity (in pounds) of gourmet ground coffee that is sold by a coffee company at a price of p dollars per pound is Q(p) = 1000 - 40p.

In science and engineering, a quantity is something that has a magnitude or size that may be expressed in numerical terms and that is associated with a unit of measurement. For example, a distance is a quantity with a size expressed in units of length.

A physical quantity that has a directional aspect is referred to as a vector. A quantity is any measurable amount or property of something, typically consisting of a value and a unit of measurement, such as length, weight, volume, or time.

it's also used to refer to a particular sum or amount of something that is counted or measured, such as a number of things or the total amount of a substance.

Therefore, The formula for finding the quantity (in pounds) of a gourmet ground coffee that is sold by a coffee company at a price of p dollars per pound is Q(p) = 1000 - 40p.

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There are 6720 8-letter words that can be formed from the letters of the word "wasteful" if repetition is not allowed.

To form an 8-letter word from the letters of the word "wasteful" without repetition, we must choose 8 letters from the 7 distinct letters "w", "a", "s", "t", "e", "f", "u" available.

Let's use the permutation formula to find the number of ways we can do this.

Permutation = (Number of objects)! / ((Number of objects) - r)!Permutation = 7! / (7 - 8)!Permutation = 7! / (-1)!But (-1)! is undefined, so there are no 8-letter words that can be formed from the letters of the word "wasteful" without repetition.

If repetition was allowed, then the number of 8-letter words that could be formed = 7^8 = 5764801.

Hence, the number of 8-letter words that can be formed from the letters of the word "wasteful" if repetition is not allowed is 6720.

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Dhruv will most probably admit precisely 1 chocolate if the probability is0.2181 or (21.81%).

Probability refers to eventuality. This area of mathematics examines how arbitrary events be.

First, the total number of ways

= C( 11, 3)

= 11!/ 8! 31

= 11 x 10 x 9/ 3x 2

= 165

Now, If Dhruv gets exactly 1 chocolate there are now 7 chocolate and

3- 1 = 2 bars

So, the number of ways for 1 exactly one chocolate

= C( 9, 2)

= 9!/ 7! 21

= 9 x 8/ 2

= 36 ways

The liability that Dhruv receives exactly one chocolate is now.

= 36/ 165

= 12/ 55

Thus, the probability that Dhruv gets exactly 1 chocolate is 12/55 ≈0.2181 or 21.81%.

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Therefore , the solution of the given problem of percentage comes out to be  earned 6.1% from the selling of the oranges.

In statistics, "a%" refers to a figure or a statistic that is expression as a percentage of 100. The letters "pct," "pct," and "pc" are also rare abbreviations. It is typically represented by the symbol "%," though. There are no indicators and a flat ratio to the overall amount. In reality, percentages are numbers because their sum almost always equals 100.

Here,

Let's suppose that the lady purchased x oranges.

She charged 60gp for each orange she sold, for a total of 60x gp.

She earned a profit of 3.05 GHC, making her overall profit

=> 3.05 GHC = 305p.

Her cost price (50gp) plus her profit (305p) would equal her total income (selling price), which would be 355gp.

=> 60x = 355

=> x = 355/60

=> x = 5.9167

She consequently purchased six bananas.

b) Since she paid 50gp for the container of oranges, their cost would be 50gp.

c) The total sale price of the oranges would be 360gp, or 60gp for each orange multiplied by 6.

d) She would have earned a profit of (profit/cost price) x 100%.

She made 305p, or 3.05 GHC, in earnings.

Her cost was 50gp, so

=> 6.1%  = (3.05/50) *  100%.

She thus earned 6.1% from the selling of the oranges.

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The values of a and b are a = 1 and b = π/4.

Explanation:

We know that the height of the innertube can be modeled by the function:

h = asinbx + 3

where h is the height in meters,

a is the amplitude of the wave,

b is the frequency of the wave in cycles per meter, and

3 is the average height of the wave.

We also know that the innertube's height fluctuates between 2 meters and 4 meters, so we can set up the following equation:

2 <= asinbx + 3 <= 4

Subtracting 3 from each term, we get:

-1 <= asinbx <= 1

Dividing by a, we get:

-1/a <= sinbx <= 1/a

Since the maximum value of sinbx is 1 and the minimum value is -1, we know that:

1/a >= 1 or -1/a <= -1

Simplifying, we get:

a <= 1 or a >= -1

However, a must be positive because it represents the amplitude of the wave. Therefore, we have:

a >= 1

Next, we can use the fact that the innertube reaches its maximum height every 8 seconds to find the value of b. Since the period of a sine function is given by:

period = 2π / b

and the period in this case is 8 seconds, we have:

8 = 2π / b

Solving for b, we get:

b = 2π / 8 = π / 4

Therefore, the values of a and b are:

a = 1 and b = π / 4

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Answer:

20.65

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

The mean of a set of numbers is the sum divided by the number of terms.

The probability that an even number or a number greater than 3 is rolled on a 12-sided die is 0.833.

A 12-sided die has 12 equally likely outcomes, numbered from 1 to 12. To find the probability of rolling an even number or a number greater than 3, we need to count the number of outcomes that satisfy this condition and divide it by the total number of possible outcomes.

There are 6 even numbers on a 12-sided die, namely 2, 4, 6, 8, 10, and 12, and there are 9 numbers greater than 3, namely 4, 5, 6, 7, 8, 9, 10, 11, and 12. However, we need to be careful not to count the numbers that satisfy both conditions twice, namely 4, 6, 8, 10, and 12.

Therefore, the number of outcomes that satisfy the condition is 6 + 9 - 5 = 10. The probability of rolling an even number or a number greater than 3 is therefore 10/12, which simplifies to 5/6 or approximately 0.833.

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Answer:

(a) Pour montrer que la suite (Un) est géométrique, il suffit de vérifier que le quotient de deux termes consécutifs est constant. Soit n un entier naturel non nul. Alors :

Un+1 / Un = (Un-4) / (Un) = 1 - 5/Un

Donc, pour tout n E N*, on a :

Un+1 / Un = 1 - 5/Un = (Un / Un) - (5/Un) = (Un - 5) / Un

On a bien trouvé une raison q = -5/1, et un premier terme U1 = U1 - 5.

(b) La raison de la suite (Un) est q = -5/1. En utilisant la formule générale de la suite géométrique, on obtient :

Un = U1 * q^(n-1) = (U1 - 5) * (-5)^(n-1)

En particulier, on a :

U_n = U_1 * q^{n-1} = (U_1 - 5) * (-5)^{n-1} = U_12 = (U_1 - 5) * (-5)^{12-1}

(c) On n'a pas suffisamment d'informations pour déterminer la valeur de U1, donc on ne peut pas calculer directement la valeur de U12.

we can download 2 songs for £2 if each song costs 90p. This calculation can be useful for budgeting and planning purchases, and it shows the importance of being mindful of the cost of individual items when making larger purchases.

To find out how many songs can be downloaded for £2, we need to divide £2 by the cost of each song.

We know that each song costs 90p, which is equivalent to £0.90. Therefore, we can set up the following equation:

£2 / £0.90 per song = x songs

To simplify the equation, we can first divide £2 by £0.90 to get the number of songs that can be downloaded:

£2 ÷ £0.90 = 2.22 (rounded to two decimal places)

So we can download 2.22 songs with £2. However, since we can't download a fraction of a song, we need to round down to the nearest whole number of songs.

Therefore, we can download 2 songs with £2 if each song costs 90p.

We can also verify this by multiplying the number of songs by the cost per song:

2 songs × 90p per song = £1.80

This means that we have spent £1.80 on two songs, leaving us with £0.20. We cannot afford another full song, so we cannot download a third song.

In conclusion, we can download 2 songs for £2 if each song costs 90p. This calculation can be useful for budgeting and planning purchases, and it shows the importance of being mindful of the cost of individual items when making larger purchases.

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The width of the enlargement will be 9 inches since the ratio of the length and width of the original recipe card is equal to the ratio of the length and width of the enlarged recipe card.

Since we want to enlarge the recipe on a 3-inch-by-5-inch index card to a length of 15 inches while maintaining the same proportions, we can use equivalent ratios to find the width of the enlargement.

Let x be the width of the enlargement in inches. Then, we can set up the following ratio:

3/5 = x/15

This ratio is formed by comparing the length and width of the original recipe card with the length and width of the enlarged recipe card.

To solve for x, we can cross-multiply and simplify:

3/5 = x/15

=> 3 * 15 = 5 * x

=> 45 = 5x

=> x = 9

Therefore, the width of the enlargement will be 9 inches.

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