The NWBC found that 67.6% of women-owned businesses provided employees health insurance. What sample size could be 90% confident that the estimated (sample) proportion is within 3 percentage points of the true population proportion?

The binary number 1011000 (base 2) is equivalent to 88 in base 10.

To find the base 10 decimal representation of the binary number 1011000 (base 2), we can use the formula:

[tex]1 * 2^6 + 0 * 2^5 + 1 * 2^4 + 1 * 2^3 + 0 * 2^2 + 0 * 2^1 + 0 * 2^0 = 88[/tex]

Therefore, the binary number 1011000 (base 2) is equivalent to 88 in base 10.

To understand how this conversion works, it is helpful to first understand what these two number systems represent.

Binary is a positional number system that uses two digits: 0 and 1. Each digit represents a different power of 2, with the rightmost digit representing 2^0, the next digit to the left representing 2^1, and so on. Therefore, the binary number 1011000 (base 2) can be interpreted as:

[tex]1 * 2^6 + 0 * 2^5 + 1 * 2^4 + 1 * 2^3 + 0 * 2^2 + 0 * 2^1 + 0 * 2^0[/tex]

To convert this binary number to base 10 (decimal), we simply evaluate this expression:

[tex]1 * 2^6 = 64[/tex]

[tex]0 * 2^5 = 0[/tex]

[tex]1 * 2^4 = 16[/tex]

[tex]1 * 2^3 = 8[/tex]

[tex]0 * 2^2 = 0[/tex]

[tex]0 * 2^1 = 0[/tex]

[tex]0 * 2^0 = 0[/tex]

Adding these values together, we get:

64 + 0 + 16 + 8 + 0 + 0 + 0 = 88

Therefore, the binary number 1011000 (base 2) is equivalent to 88 in base 10.

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Step-by-step explanation:

like they don't know, and so we don't know and so what do we do when ask that question as overtime and somewhere else

The circular arcs of radius 5 units bound the region so the area, in square units, of the region is 50.

The simplest way to think about it is as follows. Assume we wish to define R as the entire region in the first quadrant above the graph y = x 2. S is now defined as the entire region below the graph of y = x. It is obvious that the region R S equals the area in the first quadrant below y = x minus the area under the curve y = x 2. Try to figure out why this is the case, and then click Continue.

Now that we know what kind of problem we're dealing with, we can start turning it to arithmetic, namely integrals. Take note that the region of interest goes between the two curve junctions.

The area of the semicircle is = [tex]\frac{1}{2} \pi 15^2[/tex]

= 25/2π

The area of the two quarter - circles is

= 2 x 1/4 x π x 25

= 25π/2

So, the area of the region is

= 25π/2 + 5x(5+5) - 25π/2

= 50

Therefore, area of square unit is 50.

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In the long run, the likelihood of indifferent weather in Columbus on a given day is approximately 29.3%.

To find the long-term likelihood of indifferent weather in Columbus, we need to find the steady-state probabilities of the stochastic matrix provided. The matrix is given as:

P = | 0.6  0.5  0.4 |
     | 0.3  0.2  0.3 |
     | 0.1  0.3  0.3 |

1. First, find the transpose of the matrix P:
P^T = | 0.6  0.3  0.1 |
          | 0.5  0.2  0.3 |
          | 0.4  0.3  0.3 |

2. Next, subtract the identity matrix I from the transpose of P:
P^T - I = | -0.4  0.3  0.1 |
               |  0.5 -0.8  0.3 |
               |  0.4  0.3 -0.7 |

3. To find the steady-state probabilities, we need to solve the system of linear equations:
(-0.4)x + 0.3y + 0.1z = 0
0.5x - 0.8y + 0.3z = 0

We also have an additional constraint since the sum of probabilities must equal 1:
x + y + z = 1

4. Solve this system of linear equations using any method (substitution, elimination, or matrix method). The resulting probabilities are:
x = 0.432 (good weather probability)
y = 0.293 (indifferent weather probability)
z = 0.275 (bad weather probability)

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(L2) A(n) inscribed circle is a circle that is contained within a polygon so that the circle intersects each side of the polygon at exactly one point.

An inscribed circle is also known as an incircle, and it is the largest circle that can be inscribed inside a polygon. In a polygon, if all sides are of equal length and all angles are of equal measure, then the inscribed circle will be a regular circle. The center of the inscribed circle is called the incenter, and it is the point of concurrency of the angle bisectors of the polygon. The incenter is equidistant from all sides of the polygon, and the radius of the inscribed circle is equal to the distance between the incenter and any side of the polygon.

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8(a). To find the sample proportion, divide the number of adults with pinworm infestation (68) by the total number of adults in the sample (820).

Sample proportion (p) = 68 / 820 = 0.083

To find the critical value, we use a 98% confidence interval, which leaves 2% in the tails. Divide this by 2 to get 1% in each tail. Using a z-table, we find that the z-score corresponding to a 99% cumulative probability is 2.576.

Critical value (z) = 2.576

Next, we calculate the margin of error. The formula for margin of error is:

Margin of error = z * √(p * (1-p) / n)

Margin of error = 2.576 * √(0.083 * (1-0.083) / 820) ≈ 0.028

8(b). To construct the 98% confidence interval, add and subtract the margin of error from the sample proportion:

Lower limit = 0.083 - 0.028 = 0.055
Upper limit = 0.083 + 0.028 = 0.111

The 98% confidence interval is (0.055, 0.111).

8(c). We want to determine if we are 98% confident that more than 5% of all U.S. adults have pinworm. Since 0.05 is below the lower limit of the confidence interval (0.055), the correct answer is:

Yes, because 0.05 is below the lower limit of the confidence interval.

8(d). In Sludge County, the proportion of adults with pinworm is 0.12. We need to compare this to our confidence interval (0.055, 0.111). Since 0.12 is above the upper limit of the confidence interval, the correct answer is:

Yes, because 0.12 is above the upper limit of the confidence interval.

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It will take 85.32 years for the population to reach the carrying capacity of 18 billion, assuming the growth rate as 2.1% and starting population as 3 billion.

We use the "exponential-growth" model to estimate how long it will take for the population to reach the carrying capacity of 18 billion. The exponential growth model is given by : P(t) = P₀[tex]e^{rt}[/tex],

where P(t) is = population at time "t", P₀ is = initial population, r is = annual growth rate (expressed as a decimal), and e ≈ 2.71,

We have,

P₀(initial population) = 3 billion

r( growth rate) = 0.021

We want to find the value of "t" when P(t) = 18 billion. So, we can write:
18 = 3[tex]e^{0.021t}[/tex],

6 = [tex]e^{0.021t}[/tex],

ln(6) = 0.021t

t = ln(6)/0.021

t ≈ 85.32 years,

Therefore, the time taken to reach the required population is 85 years.

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The given question is incomplete, the complete question is

Assuming the carrying capacity of the earth is 18 billion, the annual growth rate is 2.1%, and the current population is 3 billion, use the exponential growth model to estimate, How long it will take for the population to reach the carrying capacity.

Answer:

137.5 miles

Step-by-step explanation:

To calculate the distance between Atlanta and Augusta, we can use the formula:

Distance = Speed x Time

We are given the speed and time, so we can substitute those values into the formula and solve for the distance.

Distance = 55 miles/hour x 2.5 hours

Distance = 137.5 miles

Therefore, Augusta is 137.5 miles away from Atlanta.

Answer: The answer is 147 miles per hour

Step-by-step explanation:

To determine the three angles in a triangle, we can use the Law of Cosines or the Law of Sines. However, since we are not given any side lengths, we will use the dot product formula to find the angles between the sides.

Then, we can compute the magnitudes of these vectors using the Pythagorean theorem:

|AB| = sqrt((Bx - Ax)^2 + (By - Ay)^2)
|AC| = sqrt((Cx - Ax)^2 + (Cy - Ay)^2)
|BC| = sqrt((Cx - Bx)^2 + (Cy - By)^2)

where (Ax, Ay), (Bx, By), and (Cx, Cy) are the coordinates of points A, B, and C, respectively.

Finally, we can use the dot product formula above to compute the cosines of angles A, B, and C, and then take the inverse cosine to find the angles in radians:

A = acos((AB · AC) / (|AB| · |AC|))
B = acos((AB · BC) / (|AB| · |BC|))
C = acos((AC · BC) / (|AC| · |BC|))

where acos denotes the inverse cosine function.

Therefore, we can determine all three angles in the triangle (in radians) using the above formulae.
It seems that the three points of the triangle were not provided in your question. To help you determine the angles of the triangle, please provide the coordinates of the three points (A, B, and C).

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Required value of Mean Square Error is 8.33.

To calculate the Mean Square Error (MS Error) for a study comparing grade point averages (GPA) for students in a class, divided by 6 locations where they usually sat during the lecture.

The Error Sum of Squares (SS Error) is 50, and the total sample size is 12 students. To calculate the MS Error, follow these steps:

1. Determine the degrees of freedom for the error (df Error).

We know,

the total sample size minus the number of groups: df Error = (total sample size) - (number of groups) df Error

= 12 - 6

= 6

2. Calculate the MS Error using the SS Error and df Error:

MS Error = SS Error / df Error MS Error

= 50 / 6 3.

So, MS Error ≈ 8.33

Therefore, The Mean Square Error (MS Error) for the study comparing GPAs for students in a class divided by 6 locations is approximately 8.33.

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Answer: 78539.82

My explanation is listed bellow

V=πr2h=π·252·40≈78539.81634

The locus of points in a plane that are equidistant from endpoints A and B is the perpendicular bisector of the line segment AB.

To see why this is true, consider a point P in the plane that is equidistant from A and B. This means that the distance from P to A is equal to the distance from P to B.

Now, draw the line segment AP and the line segment BP. Since the distance from P to A is equal to the distance from P to B, these two line segments must have the same length. Therefore, triangle APB is an isosceles triangle, and the perpendicular bisector of AB passes through the midpoint of AB and is perpendicular to AB.

Conversely, any point on the perpendicular bisector of AB is equidistant from A and B. Therefore, the perpendicular bisector of AB is the locus of points that are equidistant from A and B.

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The approximate value of the integral using the midpoint rule with n=4 is 5.8571 (rounded to four decimal places).

The area under a simple curve can be roughly estimated using the midpoint rule, commonly referred to as the rectangle method or mid-ordinate rule. The midpoint approach provides a better approximation than the left rectangle or right rectangle sum, which are two other ways for approximating the area.

We need to use the midpoint rule with n=4 to approximate the integral of 8 sin(√(x)) dx.

The midpoint rule formula for approximating a definite integral is:

∫[a,b] f(x) dx ≈ Δx [f(x1/2) + f(x3/2) + ... + f(x(n-1/2))]

where Δx = (b-a) / n is the width of each subinterval, and xi/2 = (xi-1 + xi) / 2 is the midpoint of the i-th subinterval.

For n=4, we have Δx = (b-a) / n = (1-0) / 4 = 0.25, and the endpoints of the subintervals are:

x₀ = 0, x₁ = 0.25, x₂ = 0.5, x₃ = 0.75, x₄ = 1

The midpoints of the subintervals are:

x1/2 = 0.125, x3/2 = 0.375, x5/2 = 0.625, x7/2 = 0.875

Now we can apply the midpoint rule formula:

∫[0,1] 8 sin(√(x)) dx ≈ Δx [f(x1/2) + f(x3/2) + f(x5/2) + f(x7/2)]

where f(x) = 8 sin(√(x)).

Plugging in the values, we get:

∫[0,1] 8 sin(√(x)) dx ≈ 0.25 [f(0.125) + f(0.375) + f(0.625) + f(0.875)]

Using a calculator, we can evaluate each term and sum them up:

f(0.125) ≈ 2.4774

f(0.375) ≈ 5.6382

f(0.625) ≈ 6.8171

f(0.875) ≈ 5.4946

∫[0,1] 8 sin(√(x)) dx ≈ 0.25 [2.4774 + 5.6382 + 6.8171 + 5.4946] ≈ 5.8571

Therefore, the approximate value of the integral using the midpoint rule with n=4 is 5.8571 (rounded to four decimal places).

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Based on the 1.5 × IQR rule for outliers, there is no evidence to support the student's claim because there is only one outlier at 58 minutes.

The interquartile range is the difference between upper and lower quartiles. The semi-interquartile range is half the interquartile range. When the data set is small, it is simple to identify the values of quartiles.

Mathematically, interquartile range (IQR) is the difference between quartile 1 (Q₁) and quartile 3 (Q₃):

IQR = Q₃ - Q₁

The following interquartile ranges was calculated by using Excel:

Q₃ = 31.5

Q₁ = 20.5

Now, the interquartile range (IQR) is given by:

IQR = Q₃ - Q₁

IQR = 31.5 - 20.5

IQR = 11

Based on the 1.5 × IQR rule for outliers, we have:

1.5 × IQR = 1.5 × 11 = 16.5

Therefore, our fences will be 16.5 points below Q₁ and 16.5 points above Q₃:

Lower fence = 20.5 - 16.5 = 4.5

Upper fence = 4.5 + 31.5 = 36.

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Rounding up to the nearest whole number, the sample size used to conduct this confidence interval is roughly 385. So, the sample size used to conduct this 95% confidence interval is roughly 340 students.

To find the sample size that was used to conduct this confidence interval, we need to use the formula:

n = (Z^2 * p * q) / E^2

where:

n = sample size
Z = the z-score associated with the confidence level (in this case, 1.96 for a 95% confidence interval)
p = the proportion of first-year students who played in intramural sports (0.35 in this case)
q = 1 - p (the proportion who did not play in intramural sports)
E = the margin of error (0.05 in this case)

Plugging in the values we have:

n = (1.96^2 * 0.35 * 0.65) / 0.05^2
n = 384.16

Rounding up to the nearest whole number, the sample size used to conduct this confidence interval is roughly 385.

Based on the given 95% confidence interval for the proportion of first-year students who played intramural sports, we can estimate the sample size used. The conservative interval is 35% ± 5%, which means the proportion ranges from 30% to 40%.

To calculate the sample size, we can use the following formula:

n = (Z^2 * p * (1-p)) / E^2

Where:
n = sample size
Z = Z-score for a 95% confidence level (1.96)
p = proportion (0.35)
E = margin of error (0.05)

n = (1.96^2 * 0.35 * (1-0.35)) / 0.05^2
n ≈ 340

So, the sample size used to conduct this 95% confidence interval is roughly 340 students.

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Answer:

the nearest of that is $484,500.00

Step-by-step explanation:

im not sure but im sorry if wrong

Answer:

The coupon represents a sales promotion tool in the promotion mix.

The F statistic, we divide the mean square for treatments by the mean square for error, which gives us 9.86

What is the mean and standard deviation?

The standard deviation is a summary measure of the differences of each observation from the mean. If the differences themselves were added up, the positive would exactly balance the negative and so their sum would be zero. Consequently, the squares of the differences are added.

Using the information given,

To calculate the F statistic, we divide the mean square for treatments by the mean square for error, which gives us:

F = MS(T)/MS(E) = 2280/231.11 = 9.86

The degrees of freedom for treatments is 2 (since there are three methods and we lose one degree of freedom due to the constraint that the sum of the means of each method is equal to the overall mean), and the degrees of freedom for error is 27 (which is the total number of observations minus the total number of treatments).

Therefore, the ANOVA table for this problem is in the attached figure.

Hence, the F statistic, we divide the mean square for treatments by the mean square for error, which gives us 9.86

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The value of x in the given figure consists of Central angle and Inscribed Angle is given by, x = 2.

We know that the inscribed for a semi circle is 90 degrees.

Clearly the inscribed angle for the given figure is 90 degrees.

And rest angles of the inscribed triangle are (11x - 4) and (16x + 40) degrees.

So, the sum of the rest angles must be 90 degrees too since the sum of all interior angles of triangle is 180 degree according to the Angle Sum Property of a Triangle.

So, (11x - 4) + (16x +40) = 90

11x + 16x + 40 - 4 = 90

27x + 36 = 90

27x = 90 - 36

27x = 54

x = 54/27

x = 2

Hence the value of x is given by, x = 2.

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The dimensions of the envelope are 6 inches and 8 inches.

Let's use the formula for the area of a rectangle to find the dimensions of the envelope. If we let l be the length and w be the width of the envelope, then we have:

Area = length * width = 48

Perimeter = 2 * (length + width) = 28

We can use the second equation to solve for one of the variables in terms of the other. For example, we can solve for length as:

length = (28 - 2 * width) / 2

Now we can substitute this expression for length into the first equation to get:

width * ((28 - 2 * width) / 2) = 48

Simplifying this equation, we get:

14w -[tex]w^{2}[/tex] = 48

Rearranging and factoring, we get:

[tex]w^{2}[/tex] - 14w + 48 = 0

(w - 6)(w - 8) = 0

So the possible values for the width are w = 6 or w = 8. If we plug these values into the equation we derived for the length, we get:

length = (28 - 2 * 6) / 2 = 8

or

length = (28 - 2 * 8) / 2 = 6

Therefore, the dimensions of the envelope are either 6 inches by 8 inches or 8 inches by 6 inches.

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at the 5% level of significance, we can conclude that the population median score for the students taking the writing portion of the SAT is not 500.

We can use the Wilcoxon rank-sum test (Mann-Whitney U test) to test the hypothesis that the population median score for the students taking the writing portion of the SAT is 500.

Null Hypothesis: The population median score for the students taking the writing portion of the SAT is 500.

Alternative Hypothesis: The population median score for the students taking the writing portion of the SAT is not 500.

We can use the Wilcoxon rank-sum test because the sample size is small, and the population distribution is not known. The Wilcoxon rank-sum test does not require the normality assumption.

Using the given data, we rank the scores, and then calculate the test statistic U as follows:

Rank: 13 14 2 3 4 6 1 5 7 8 3 11 0 0 9

Sample size (n) = 15

Sum of ranks for students with scores >= 500 (R1) = 61

Sum of ranks for students with scores < 500 (R2) = 54

U = min(R1, R2) = 54

Using Table 1 of Appendix B for alpha = 0.05 and n1 = n2 = 15, the critical value of U is 19.

Since U = 54 is greater than the critical value of 19, we reject the null hypothesis and conclude that there is evidence that the population median score for the students taking the writing portion of the SAT is not 500.

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With a $1 bet on three numbers, you can expect to win $12.33. So, the expected winnings for a $1 bet on three numbers in a roulette wheel is approximately $0.95.

Here's how to calculate it:
- There are 38 possible outcomes on the roulette wheel (1 through 36, 0, and 00).
- Your bet covers 3 of those outcomes, so your probability of winning is 3/38.
- The payout for a winning bet is $1 plus another $11, for a total of $12.
- To find your expected winnings, multiply the probability of winning by the payout:
  (3/38) x $12 = $0.947
- Rounded to the nearest cent, that's $0.95.
So with a $1 bet on three numbers, you can expect to win about $0.95 each time, on average. Over many bets, your total winnings will approach $12.33.

In order to calculate the expected winnings from a $1 bet on three numbers in a roulette wheel, we can follow these steps:
1. Determine the probability of winning the bet. In a roulette wheel with 38 numbers (1-36, 0, and 00), you bet on three numbers, so the probability of winning is 3/38.
2. Determine the amount you would win if your bet is successful. Since the bet pays 11 to 1, you would get back your original $1 plus another $11, for a total of $12.
3. Multiply the probability of winning by the amount you would win. This will give you the expected winnings for a single $1 bet:
(3/38) * $12 = $0.947
So, the expected winnings for a $1 bet on three numbers in a roulette wheel is approximately $0.95 (rounded to the nearest cent).

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The r-value ranges from -1 to +1, with -1 indicating a strong negative correlation. Therefore, the r-value closest to -1 represents the strongest negative correlation.

An r-value represents the strength and direction of a correlation between two variables. The strongest negative correlation occurs when the r-value is -1. In this case, as one variable increases, the other variable decreases consistently, showing a perfect negative linear relationship between the two variables.

The ability of a material to resist the flow of heat through it is gauged by the R-value , which is used in materials research and building construction. It measures the energy efficiency of insulation materials including fibreglass, foam board, and cellulose and is commonly represented in square metres kelvin per watt (m2K/W) units.

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If boat is heading towards a lighthouse, whose beacon-light is 142 feet above the water, the distance from point A to point B is approximately 226.6 feet.

To find the distance from point A to point B, we can use the tangent function. Let x be the distance between point A and the lighthouse, and let y be the distance between point B and the lighthouse. We can then set up two equations based on the angles of elevation:

tan(13°) = 142/x

tan(20°) = 142/y

Solving for x and y, we get:

x = 142/tan(13°) ≈ 627.8 feet

y = 142/tan(20°) ≈ 401.2 feet

The distance between point A and point B is the difference between x and y:

x - y ≈ 226.6 feet

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Complete question is:

A boat is heading towards a lighthouse, whose beacon-light is 142 feet above the water. From point A, the boat’s crew measures the angle of elevation to the beacon, 13 degree, before they draw closer. They measure the angle of elevation a second time from point B at some later time to be 20 degrees . Find the distance from point A to point B. Round your answer to the nearest foot if necessary.

The null hypothesis (H0) is that the proportion of clients who have high-risk stocks is equal to or greater than 15%, while the alternative hypothesis (H1) is that the proportion of clients who have high-risk stocks is less than 15%. In other words, the null hypothesis assumes that p >= 0.15 and the alternative hypothesis assumes that p < 0.15.

To Test These hypotheses, the brokerage firm can collect a sample of clients and determine the proportion of those clients who have high-risk stocks in their portfolio. If the sample proportion is significantly lower than 15%, the firm can reject the null hypothesis and conclude that there is evidence to suggest that the true proportion of clients with high-risk stocks is less than 15%.

If the sample proportion is not significantly lower than 15%, the firm fails to reject the null hypothesis and cannot conclude that the true proportion of clients with high-risk stocks is less than 15%.

It is important for the brokerage firm to accurately determine the proportion of clients with high-risk stocks, as this information can help them manage their clients' portfolios more effectively and reduce the overall risk of their business.

By testing these hypotheses, the firm can gain a better understanding of the risk level of their clients' investments and make informed decisions about how to allocate their resources.

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The initial size of the bird population was approximately 4,619 birds, and the estimated population 2 years from now is approximately 6,528 birds.

We are dealing with a bird population that doubles every 10 years. To find the initial population 25 years ago, we can use the formula:

Initial population = Current population / (2^(Years since introduction / 10))

Here, the current population is 13,000, and it has been 25 years since the bird species was introduced. Plugging in these values, we get:

Initial population = 13,000 / (2^(25 / 10))

Initial population = 13,000 / (2^2.5)

Initial population ≈ 4,619 birds (rounded to the nearest whole number)

To estimate the bird population 2 years from now, we can use the same formula with a total of 27 years since the introduction:

Future population = Initial population * (2^(Years since introduction / 10))

Future population = 4,619 * (2^(27 / 10))

Future population ≈ 6,528 birds (rounded to the nearest whole number)

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there are 1500 different super subs that can be made.

What is combination?

In mathematics, a combination is a way of selecting objects from a set, where the order in which the objects are selected does not matter. Combinations are used in various areas of mathematics and statistics, as well as in real-world applications such as probability theory, genetics, and computer science.

For the toppings, we have to choose 4 out of the 6 available, so the number of ways to do that is:

6C4

=15

This is the number of combinations of 4 toppings that can be chosen from 6.

For the condiments, we have to choose 3 out of the 6 available, so the number of ways to do that is:

6C3

=20

This is the number of combinations of 3 condiments that can be chosen from 6.

Finally, we have 5 choices of bread.

Therefore, the total number of different super subs that can be made is:

15*20*5 = 1500

So there are 1500 different super subs that can be made.

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Jackie sold an average of 35/52 liters of lemonade per day during her first 13 days in business. So, correct option is B.

To find the average amount of lemonade sold per day, we need to find the total amount of lemonade sold and divide it by the number of days.

To do this, we can add up the amounts sold each day:

(3/8) + (3/8) + (4/8) + (4/8) + (4/8) + (5/8) + (5/8) + (6/8) + (6/8) + (6/8) + 1 + 1 + 1

Simplifying the fractions, we get:

(3/8) + (3/8) + (4/8) + (4/8) + (4/8) + (5/8) + (5/8) + (3/4) + (3/4) + (3/4) + 1 + 1 + 1

= 8 + 6/8

So, Jackie sold a total of 8 6/8 liters of lemonade in 13 days.

To find the average per day, we divide this by the number of days:

(8 6/8) ÷ 13

We can convert the mixed number to an improper fraction and simplify:

(70/8) ÷ 13

= 70/104

= 35/52

Therefore, correct option is B.

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The joint density function of x and y is f(x,y) = 1 for 0 <= x <= 1 and 0 <= y <= 1.

The joint density function of two random variables x and y is a function that assigns a non-negative value to every possible pair of x and y values. In this case, since x and y are independent and identically distributed uniform random variables on [0,1], their joint density function is given by the product of their individual density functions:

f(x,y) = f(x) × f(y) = 1 × 1 = 1, 0 <= x <= 1, 0 <= y <= 1

So the joint density function of x and y is f(x,y) = 1 for 0 <= x <= 1 and 0 <= y <= 1.

Since x and y are independent and identically distributed uniform random variables on [0,1], their probability density functions (PDFs) are given by:

f(x) = 1, 0 <= x <= 1

f(y) = 1, 0 <= y <= 1

The joint probability density function (PDF) of x and y is given by the product of their individual PDFs:

f(x,y) = f(x) × f(y) = 1 × 1 = 1, 0 <= x <= 1, 0 <= y <= 1

Therefore, the joint density function of x and y is f(x,y) = 1 for 0 <= x <= 1 and 0 <= y <= 1.

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According to the question the length of arc BC is approximately 1.69 feet.

The measurement of the circle's boundaries is called as the circumference or perimeter of the circle. whereas the circumference of a circle determines the space it occupies. The circumference of a circle is its length when it is opened up and drawn as a straight line. Units like cm or unit m are typically used to measure it. The circle's radius is considered while calculating the circumference of the circle using the formula. As a result, in order to calculate the circle's perimeter, we must know the radius or diameter value.

The circumference of a circle is given by the formula[tex]$C = 2\pi r$[/tex], where $r$ is the radius of the circle. In this case, the radius is 8 feet, so the circumference of the circle is: C=16π feet.

Since the angle BAC is one-third of a radian, we know that angle BOC (the angle at the center of the circle) is twice as large, or approximately $38.2^\circ$. This is because the angle at the center of the circle is twice as large as the angle on the circumference that it intercepts.

Now we can use this angle to find the length of arc BC. The formula for the length of an arc is: L = Ф/360 *C

L = 38.2/350 * 16π = 1.69 feet.

So the length of arc BC is approximately 1.69 feet.

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