Select the correct answer from the drop-down menu. An energy drink company claims that its product increases students' memory levels. To support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. The missing component in this study is a . Reset Next

The length of the rectangle is 7 units.

Length is a measure of distance or size. It is typically measured in meters, centimeters, feet, or inches. Length is a fundamental concept in mathematics, physics, and engineering. It is used to measure the size of an object or the distance between two points. Length is an important factor in the design of many structures, including buildings, bridges, and roads. Length can also be used to describe the duration of time, such as the length of a movie or a song.

To solve this problem, we will use the formula for the area of a rectangle, which is A = lw. We know that the width is the length minus 6 units, so we can rewrite the area equation as: A = (l-6)l. We then solve for l by multiplying both sides of the equation by l and dividing by l-6, giving us: l = A/(l-6). Since the area is 7 square units, we can plug in 7 for A and solve for l: l = 7/(l-6). We then solve for l by solving for the value of l on both sides of the equation, giving us: l = 7/(7-6) = 7/1 = 7. Therefore, the length of the rectangle is 7 units.

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Answer:

cosθ = 3root58 / 58

cscθ = root58 / 7

tanθ = 7/3

Step-by-step explanation:

Draw a picture of the point. You can make a right triangle. One leg is 3 and one leg is 7. You can find the third side with Pythagorean Theorem or distance formula.

see image.

Then use right triangle trigonometry to find cosθ, cscθ, tanθ.

cosθ is the adjacent side over the hypotenuse.



cscθ is sinθ flipped over.

tanθ is opposite side over adjacent side.

see image

[tex]\underset{in~degrees}{\textit{sum of all interior angles}}\\\\ n\theta = 180(n-2) ~~ \begin{cases} n=\stackrel{number~of}{sides}\\ \theta = \stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ \theta =140 \end{cases}\implies n140=180n-360 \\\\\\ 140n+360=180n\implies 360=40n\implies \cfrac{360}{40}=n\implies 9=n \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ their~sum }{(9)(140)}\implies \text{\LARGE 1260}[/tex]

Answer:

c, 1/4

Step-by-step explanation:

There are six possibilities when rolling a single dice (1, 2, 3, 4, 5, 6). When rolling two dice, there are 36 combinations because 6x6=36. 1/2 of the numbers on each piece of dice are even, so if we multiply 1/2x1/2, we get an answer of 1/4.

a. Mean: 85.4; Standard deviation: 12.1

b. Five-number summary: 60, 78, 88, 95, 98

c. The test scores appear to form a normal distribution. The data points form a symmetric pattern about the mean of 85.4, indicating that the majority of the test scores are concentrated near the mean and gradually become less common as you move away from the mean.

d. The mean of 85.4 and standard deviation of 12.1 indicate that most of the test scores are clustered in the middle, with a few outliers on both the higher and lower end. This suggests that the test was neither too easy nor too difficult for the students, as it was not too difficult to achieve a higher score nor too easy to achieve a low score.

Standard deviation is a measure of how spread out data points are from the mean. It is calculated by taking the square root of the variance and can be used to measure the volatility of a data set. By looking at the standard deviation, one can determine the amount of variability in a given set of data.

The mean of the test scores is 85.4, which is calculated by adding the scores together and dividing by the total number of scores (13). The standard deviation of the scores is 12.1, which is calculated by taking the square root of the variance (217.8). The five-number summary of the test scores is 60, 78, 88, 95, and 98. This means that the minimum score is 60, the first quartile is 78, the median is 88, the third quartile is 95, and the maximum score is 98. This type of distribution is a right-skewed distribution, meaning that most of the scores are closer to the upper end of the range and there are fewer scores near the lower end. This is evident from the five-number summary, where the median is lower than the mean and the third quartile is close to the maximum score.

From this distribution, it is possible to infer that the test was likely a hard test for these students. This is because the mean score of 85.4 is much lower than the maximum score of 98, indicating that not many students were able to achieve the highest score. Additionally, the standard deviation of 12.1 is relatively large, indicating that there is a wide range of scores. This is further evidence that the test was difficult for the students.

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Answer:

To determine if s is inversely proportional to f, we need to check if their product is constant. Let's multiply s and f for each row:

s * f = 0.2 * 5 = 1

s * f = 0.5 * 2 = 1

s * f = 1.4 * 0.714 ≈ 1

s * f = 7.5 * 0.133 ≈ 1

s * f = 3 * 0.3 = 0.9

As we can see, the product of s and f is approximately constant for all rows except the last one. This means that s and f are not inversely proportional in general.

However, we can see that the product of s and f is close to 1 for the first four rows. This suggests that s and f may be inversely proportional for values of s less than 3.

To confirm this, we can calculate the constant of proportionality k using the first two rows:

s * f = k

0.2 * 5 = k

k = 1

Therefore, the equation relating s and f is:

s * f = 1

or

f = 1/s

This shows that s and f are indeed inversely proportional for values of s less than 3. However, for s = 3, the product of s and f is 0.9 instead of 1, which means that s and f are not inversely proportional for this value of s.

Answer:

the volume is 5 to the next power which is 3 u end up with multiplication which mean u multiply 5 with 3 to get ur units

The equation which accurately represents the statement as given are; 4.9x - (-3) = 12.8; 3 + 4.9x = 12.8; and 12.8 = 4.9x + 3.

As evident from the task content; the given statement is; Negative 3 less than 4.9 times a number, x, is the same as 12.8.

Therefore, we have ;

4.9x - (-3) = 12.8

Or by evaluation;

3 + 4.9x = 12.8

Or by rearrangement;

12.8 = 4.9x + 3.

On this note, the equations which represent the given word phrase are; 4.9x - (-3) = 12.8; 3 + 4.9x = 12.8; and 12.8 = 4.9x + 3.

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Answer:

See below.

Step-by-step explanation:

We are asked to find the volume of the cereal box.

This cereal box is a rectangular prism, meaning that the cereal box should have 3 given dimensions; Length, Width, and Height.

[tex]Volume = Length \times Width \times Height.[/tex]

We have all 3 dimensions already, now we can solve for the volume.

Substitute:

[tex]Volume = 3 \times 12 \times 18.[/tex]

[tex]Volume = 648in^3.[/tex]

Answer:

To find the area of the reduced triangle, we need to know the length of the base and the height of the triangle after the scaling.

Since the triangle has been reduced by a scale of 0.4, the length of each side has been multiplied by 0.4. Therefore, the base of the reduced triangle is:

10 cm × 0.4 = 4 cm

To find the height of the reduced triangle, we can use the fact that the ratio of corresponding sides in similar triangles is the same. Since the triangle has been scaled down by a factor of 0.4, the ratio of the corresponding sides is 0.4. Therefore, the height of the reduced triangle is:

30 cm × 0.4 = 12 cm

Now that we know the base and the height of the reduced triangle, we can calculate its area using the formula:

Area = (1/2) × base × height

Area = (1/2) × 4 cm × 12 cm

Area = 24 cm²

Therefore, the area of the reduced triangle is 24 cm².

Step-by-step explanation:

The proportion of the shaded area in the rectangle is 0.111.

The shaded area of the rectangle can be calculated by subtracting the area of the unshaded area from the total area of the rectangle. The total area of the rectangle is 36 units2 (Area = length x width). The unshaded area is 32 units2 (Area = 4 x 9). Therefore, the shaded area is 4 units2 (36-32).

The proportion of the shaded area in the rectangle can be calculated by dividing the area of the shaded area by the total area of the rectangle. The proportion of the shaded area is 4/36, or 1/9. This can also be expressed as a decimal, 0.111.

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a)  The p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis that μ1 < μ2.

b) We can construct a (1 - α) confidence interval for the difference between the population means μ1 and μ2 to conduct the test

c) The power of the test is approximately 0.012 when μ1 is three units less than μ2.

The test statistic for this hypothesis test is:

t = (x1 - x2) / √(s1²/n1 + s2²/n2)

Plugging in the given values, we get:

t = (6.2 - 7.8) / √(4/15 + 6.25/15) = -2.72

Using a t-distribution with degrees of freedom equal to (15 + 15 - 2) = 28 and a significance level of α = 0.05, we find the critical value to be -1.701. Since the test statistic is less than the critical value, we reject the null hypothesis.

The p-value can be calculated using a t-distribution with degrees of freedom equal to 28:

p-value = P(T < -2.72) = 0.0068

Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis that μ1 < μ2.

To conduct the test using a confidence interval, we can construct a (1 - α) confidence interval for the difference between the population means μ1 and μ2:

(x1 - x2) ± t(1-α/2, n1+n2-2) * √(s1²/n1 + s2²/n2)

Plugging in the given values and using a t-distribution with degrees of freedom equal to 28 and a confidence level of 95% (α = 0.05), we get:

(6.2 - 7.8) ± 2.048 * √(4/15 + 6.25/15)

-2.168 < μ1 - μ2 < -0.232

Since the confidence interval does not include zero, we can conclude that there is evidence to support the alternative hypothesis that μ1 < μ2.

The power of a hypothesis test is the probability of correctly rejecting the null hypothesis when the alternative hypothesis is true. In this case, the alternative hypothesis is μ1 < μ2, so we want to calculate the probability of rejecting the null hypothesis when μ1 is actually three units less than μ2.

To do this, we need to calculate the test statistic and find the corresponding probability using a t-distribution with degrees of freedom equal to 28 and a significance level of 0.05.

The test statistic for this case is:

t = (x1 - x2 - Δ) / √(s1²/n1 + s2²/n2) = (6.2 - 7.8 - 3) / √(4/15 + 6.25/15) = -4.14

Using a t-distribution with degrees of freedom equal to 28, we find the probability of correctly rejecting the null hypothesis to be:

power = P(T < -t_crit) = P(T < -1.701 - (-4.14)) = P(T > 2.439) ≈ 0.012

Therefore, the power of the test is approximately 0.012 when μ1 is three units less than μ2. This means that the test is not very sensitive to detecting a difference of three units between the two population means.

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The amount that Instant Meals spends on postage to mail out 188 samples is: 19458 cents

The parameters are given as:

W = 64 oz

Total quantity = 188 samples

Charge = 36 cents per 1.5 pounds

Thus converting pounds tp oz, we have;

Charge = 36 cents per 24 oz

Required:

Total amount to pay the parcels

Solution:

Multiply W to 188 samples,

Total weight = 69 oz. (188)

Total weight = 12,972 oz.

Use the charge as an conversion factor,

Total price to pay:

P = 12,972 oz. (36 cents / 24 oz.)

P = 19458 cents

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The radius of the fifth sphere  or the value of r is 14.14

In order to determine the value of the radius r of the fifth sphere, we must first calculate the side length of the square that the four spheres of radius 10 form.

Since all four spheres are touching, the side length of the square is equal to 20. Thus, the area of the square is equal to 400. Since the fifth sphere is touching each of the four other spheres and the centre of the square formed by them, the fifth sphere is sitting at the midpoint of each side of the square.

Thus, the distance from the centre of the square to the centre of the fifth sphere is 10, which is half the side length of the square.  Now, we can calculate the radius of the fifth sphere using the Pythagorean theorem.

The triangle we will use is a right triangle with the side lengths of 10 and 10.

Thus, the hypotenuse (which is the radius of the fifth sphere r) is equal to the square root of 200. Therefore, the radius of the fifth sphere is approximately 14.14.

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2) The measure οf angle ZXY is 125 degrees

3) The length οf the rectangle is 25 cm.

If the rectangle has a length οf 'l' and a width οf 'b', then the area οf the rectangle can be cοmputed by using the fοrmula:

Area = length * width

If the ratiο οf the measure οf angle WXZ tο the measure οf angle ZXY is 11:25, we can write this as:

x:y = 11:25

where x is the measure οf angle WXZ, and y is the measure οf angle ZXY.

We knοw that the sum οf the measures οf these twο angles is 180 degrees, since they are angles in a triangle. Therefοre, we can set up an equatiοn:

x + y = 180

We can sοlve this equatiοn fοr x in terms οf y:

x = 180 - y

Nοw we can substitute this expressiοn fοr x intο the ratiο:

(180 - y) : y = 11 : 25

We can crοss-multiply tο get:

25(180 - y) = 11y

Expanding and simplifying:

4500 - 25y = 11y

36y = 4500

y = 125

Therefοre, the measure οf angle ZXY is 125 degrees.

Let's call the width οf the rectangle w and the length οf the rectangle l. We knοw that the ratiο οf width tο length is 4:5, sο we can write:

w:l = 4:5

We alsο knοw that the area οf the rectangle is 500 square centimeters, sο we can write:

w * l = 500

Nοw we can use the ratiο tο sοlve fοr οne οf the variables in terms οf the οther. Let's sοlve fοr w in terms οf l:

w:l = 4:5

w = (4/5)l

Substitute this expressiοn fοr w intο the area equatiοn:

(4/5)l * l = 500

Simplify:

[tex]4l^2/5 = 500[/tex]

[tex]4l^2 = 2500[/tex]

[tex]l^2 = 625[/tex]

[tex]l = 25[/tex]

Therefοre, the length οf the rectangle is 25 cm. Tο find the width, we can use the ratiο:

w:l = 4:5

w = (4/5)l = (4/5) * 25 = 20

Therefοre, the width οf the rectangle is 20 cm.

Hence,

2) The measure οf angle ZXY is 125 degrees

3) The length οf the rectangle is 25 cm.

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Since, Consider a set of data in which the sample mean is 33. 7 and the sample standard deviation is 7. 2. Calculate the z-score given that

x= 30. 2. Therefore, the Z score is -0.486111.

Z score:

Standard scores are often referred to as z-scores; the two terms are used interchangeably. Other equivalent terms used include z-score, normal score, standardized variable, and high-energy physical attraction.

In statistics, a standard score is the number of standard deviations by which a raw score (i.e. an observation or data point) has a value greater than or less than the observed or measured mean. Raw scores above the mean have positive standard scores, while raw scores below the mean have negative standard scores.

Given that:

Sample mean (μ) = 33.7

Standard deviation (σ) = 7.2

X = 30.2

We know that:

Z score = X -μ/ σ

z-score using the formula z = (x - μ) / σ,

where,

x is your data point,

μ is the mean, and

σ is the standard deviation.

Putting the values in the equation:

⇒ Z score = X -μ/ σ

                 = 30.2 - 33.7/ 7.2

                 = -0.486111

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There is no answer since we cannot take the square root of a negative trigonometry value. As a result, the issue as presented cannot be resolved.

The area of mathematics called trigonometry examines how triangle side lengths and angles relate to one another. The subject first came to light in the Hellenistic era, about in the third century BC, as a result of the use of geometry in astronomical investigations. The area of mathematics known as exact techniques deals with several trigonometric functions and possible computations using them. There are six common trigonometric functions in trigonometry. These go by the designations sine, cosine, tangent, cotangent, secant, and cosecant, respectively (csc). Trigonometry is the study of triangle characteristics, particularly those of right triangles. Consequently, studying geometry entails learning about the characteristics of all geometric forms.  

Trigonometry can be used to resolve this issue. We'll abbreviate the angle between the stairs and the slide as "".

We must first determine the slide's height. The Pythagorean Theorem allows us to perform the following:

Height 2 equals (slide length)/2 - (distance from step bottom to bottom of slide)/2 Height 2 equals 4.2/2 - 4.9/2 Height 2 equals -7.55

There is no answer since we cannot take the square root of a negative value. As a result, the issue as presented cannot be resolved.

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Answer:

The answer to your problem is, B. reflection across the y-axis

Step-by-step explanation:

The relation between preimage and image is defined by the rule

( x,y ) —> ( -x,y )

Reflection across y-axis represented by the above rule.

It means the △ABC is reflected across the y-axis to form​​ △A'B'C' ​.

Thus the answer to your problem is, B. reflection across the y-axis

Therefore, the open box with the largest volume has a length  of [tex]20” - 2(4”) = 12”[/tex], and a height of 4”. The volume of the resulting box is 0 x 12 x 4 = 0 cubic inches.

The resulting box with the largest volume can be created by cutting out 4 squares with the same dimensions from each corner of the 8-inch by 20-inch cardboard. After cutting the squares, the sides can be bent up to form an open box. The dimensions of the box with the largest volume can be calculated using the formula for the volume of a rectangular prism, [tex]V = L x W x H.[/tex]

In this case, L = 8” - 2x, W = 20” - 2x, and H = x, where x is the length of each side of the square cut from each corner. The volume of the resulting box will be maximized when x is the greatest value that still produces a box with the given dimensions. Solving the equation, 8” - 2x = x, yields x = 4”.

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(a)  The probability of getting a face card or a number card is:P(face card or number card) = (12/52) + (40/52) = 52/52 = 1

(b)  The probability of drawing a black and a Queen is:P(black and a Queen) = (26/52) × (2/26) = 2/52 = 1/26

(c) The probability of drawing a black and a face card is:P(black and a face card) = (26/52) × (6/26) = 6/52 = 3/26.

(d) The probability of drawing a Queen and a 3 is 0.

(e)  The probability of drawing a black or a 3 is:P(black or 3) = (26/52) + (4/52) - (2/52) = 28/52 = 7/13.

The probability of getting a face card or a number card is:P(face card or number card) = P(face card) + P(number card)There are 12 face cards in a deck of 52 cards. There are 4 Kings, 4 Queens, and 4 Jacks.There are 52 - 12 = 40 cards which are not face cards. There are four 2's, four 3's, four 4's, four 5's, four 6's, four 7's, four 8's, four 9's, and four 10's.Therefore, the probability of getting a face card or a number card is:P(face card or number card) = (12/52) + (40/52) = 52/52 = 1

The probability of drawing a black and a Queen is:P(black and a Queen) = P(black) × P(Queen given black)The probability of drawing a black card is 26/52 since there are 26 black cards in a deck of 52 cards. The probability of drawing a Queen, given that it is a black card is 2/26, since there are two Queens among the 26 black cards.Therefore, the probability of drawing a black and a Queen is:P(black and a Queen) = (26/52) × (2/26) = 2/52 = 1/26

The probability of drawing a black and a face card is:P(black and a face card) = P(black) × P(face card given black)The probability of drawing a black card is 26/52 since there are 26 black cards in a deck of 52 cards. The probability of drawing a face card given that it is a black card is 6/26 since there are 6 face cards among the 26 black cards.Therefore, the probability of drawing a black and a face card is:P(black and a face card) = (26/52) × (6/26) = 6/52 = 3/26

The probability of drawing a Queen and a 3 is:P(Queen and 3) = 0Since there are no 3's among the Queens, the probability of drawing a Queen and a 3 is 0.

The probability of drawing a black or a 3 is:P(black or 3) = P(black) + P(3) - P(black and 3)The probability of drawing a black card is 26/52. The probability of drawing a 3 is 4/52. There are two 3's which are black cards.Therefore, the probability of drawing a black or a 3 is:P(black or 3) = (26/52) + (4/52) - (2/52) = 28/52 = 7/13.

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We can say that after answering the offered question Therefore, the Pythagorean theorem model dimension of the bicycle wheel diameter is 120 inches.

The Pythagorean Theorem is the foundational Euclidean geometry connection that exists between the three sides of the right triangle. According to this rule, the area of either a cube with the length x side is equal to the total of the regions of triangles shared by its other two sides. According to the Pythagorean Theorem, the square that spans the hypotenuse of a right triangle opposite the perfect angle is the combined squares that spanned its sides. It is sometimes expressed as a2 + b2 = c2 in general algebraic notation.

multiplying it by 12 and then multiplying by 5 to get the model dimension in inches:

[tex]$2\text{ ft} \times 12\text{ in/ft} \times 5 = 120\text{ in}$[/tex]

Therefore, the model dimension of the bicycle wheel diameter is 120 inches.

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The image of the given points under the rotation through +90° about the center origin include the following;

A' (-5, 4).

B' (-3, -2).

C' (5, -3).

D' (1, 4).

In Geometry, the rotation of a point 90° about the center (origin) in a counterclockwise (anticlockwise) direction would produce a point that has these coordinates (-y, x).

By applying a rotation of 90° counterclockwise to the vertices of each figure, the coordinates of the vertices of the image are as follows:

(x, y)    →       (-y, x)

A (4, 5) = A' (-5, 4).

B (-2, 3) = B' (-3, -2).

C (-3, -5) = C' (-(-5), 3) = (5, -3)

D (4, -1)​ = D' (-(-1), 4) = (1, 4)

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Answer:

Based on the given input-output pairs (2,8), (3,11), and (4,14), it appears that the rule for this function table is to multiply the input by 3 and then add 2 to get the output. In other words, for an input x, the output is given by the function f(x) = 3x + 2.

Answer:

they are not similiar

Step-by-step explanation:

..........

The area of the container can be calculated by multiplying its width, height, and length together ,the area of the container is 1,920 square feet.

The area of a container can be calculated by multiplying its width, height, and length. In order to find the area of the container in this problem, the width of 8 feet, the height of 12 feet, and the length of 24 feet must be multiplied together. Mathematically, this can be expressed as A = 8 × 12 × 24. Solving the equation yields a result of 1,920 square feet.

To calculate the area of the container in square feet, begin by multiplying the width, height, and length together. 8 × 12 × 24 = 1,920. This result can be written as 1,920 square feet. Therefore, the area of the container is 1,920 square feet.

Using basic algebra, the area of the container can be found by multiplying its width, height, and length. 8 × 12 × 24 = 1,920 square feet. This can be written as A = 8 × 12 × 24, where A represents the area of the container in square feet. Solving the equation yields a result of 1,920 square feet. This result can be interpreted to mean that the area of the container is 1,920 square feet.

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The answer choice A is x(x + 6)(x + 4), which is the polynomial [tex]x^3 + 10x^2 + 24x[/tex]  fully factored form.

The quadratic expression enclosed in parenthesis can be factored:

x(x + 6)(x + 4)

Algebraic expressions called polynomials include coefficients and variables. Indeterminates are another name for variables. For polynomial expressions, we can do mathematical operations like addition, subtraction, multiplication, and positive integer exponents but not division by variables.[tex]x^2+x-12[/tex] is an illustration of a polynomial with a single variable.

from the question:

The given polynomial is[tex]x^3 + 10x^2 + 24x.[/tex]

From each term, we may factor out the common factor of x:

[tex]x(x^2 + 10x + 24)[/tex]

The quadratic expression enclosed in parenthesis can be factored:

x(x + 6)(x + 4)

As a result, solution option A is the fully factored version of the polynomial [tex]x^3 + 10x^2 + 24x[/tex] , which is x(x + 6)(x + 4).

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