Un vêtements qui coutait initialement 100€ a vu son prix diminuer de 30% une première fois puis une deuxième fois de 20%.Quel pourcentage de réduction correspond à ces deux baisses successives?

In a one-sided hypothesis test for the mean for a random sample of size 20, the t-score of the sample mean is 2.615 in the direction of the alternative. This significant at the 5% level and not significant at 1% level.

In hypothesis testing, the t-score measures how many standard errors the sample mean is from the hypothesized population mean. The formula for calculating the t-score is:

t = (sample mean - hypothesized population mean) / (standard error of the mean)

In this case, we are given that the t-score is 2.615 and that it is in the direction of the alternative hypothesis (which means the sample mean is greater than the hypothesized population mean). We can use a t-table or a statistical software to find the p-value associated with this t-score.

Assuming a two-tailed test (since we don't know if the alternative hypothesis is greater than or less than the null hypothesis), the p-value is the probability of getting a t-score greater than or equal to 2.615 or less than or equal to -2.615 (the negative value since it's a two-tailed test).

Using a t-table with 19 degrees of freedom (since the sample size is 20 and we are estimating one parameter), we find that the p-value is approximately 0.014 for a one-tailed test in the direction of the alternative.

To determine if the result is significant at the 5% level or 1% level, we compare the p-value to the significance level (alpha). If the p-value is less than alpha, we reject the null hypothesis and conclude that the result is statistically significant.

For a one-tailed test at the 5% level, alpha = 0.05. Since the p-value (0.014) is less than alpha, we reject the null hypothesis and conclude that the result is significant at the 5% level.

For a one-tailed test at the 1% level, alpha = 0.01. Since the p-value (0.014) is greater than alpha, we fail to reject the null hypothesis and conclude that the result is not significant at the 1% level.

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Hence, there is a 28.22 degree depression from the owl to the mouse as the inverse tangent of the two sides.

An angle is a geometric shape made up of two rays or lines that share a termination known as the vertex. A whole circle has 360 degrees, which is how angles are typically measured. Angles can be acute (less than 90 degrees), right (exactly 90 degrees), obtuse (more than 90 degrees but less than 180 degrees), straight (exactly 180 degrees), reflex, or compound (any combination of these) (greater than 180 degrees but less than 360 degrees). Calculus, geometry, trigonometry, and other branches of mathematics all make use of angles.

given

To resolve this issue, we can make use of the tangent function. Let x be the depression angle between the owl and the mouse. Next, we have:

Tangent(x) = adjacent/opposite

where the distance between the owl and the mouse is on the adjacent side and the opposite side is the height of the owl above the field (42 m) (78 m).

Tangent(x) equals 42/78

When we take the inverse tangent of the two sides, we obtain:

x = (42/78) arctan

Calculating the answer, we discover:

28.22 degrees x

Hence, there is a 28.22 degree depression from the owl to the mouse as the inverse tangent of the two sides.

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It is TRUE that If you want to calculate the total magnification, take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, usually 10X.

If you want to get the total magnification of a microscope, you need to multiply the magnification of the objective lens by the magnification of the eyepiece lens. The objective lens typically has a magnification of 4X, 10X, or 40X, and the eyepiece lens usually has a magnification of 10X. So, for example, if you are using a 10X objective lens and a 10X eyepiece lens, the total magnification would be 10 × 10 = 100X.

On the other hand, these numbers may be the total magnification for a lower powered stereomicroscope. 10X and 40X are achievable with 10X eyepieces and 1X or 4X objective lenses. Or it can be a zoom stereomicroscope with zoom set to 1X and 4X and 10X eyepieces. To get a total of 4X, you can use the 0.8X zoom setting (which is common) plus the 5X eyepiece. Or you can use the 0.5x auxiliary lens, 0.8x zoom and 10x eyepieces.

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Complete Question:

True, or False

To get the total magnification take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, usually 10X.

Solution set for both inequalities is x ≤ 3 and x ≥ 3, which can be written as x = 3.

The two inequalities are: x + 5 < 8 and x + 5 > 8. The first inequality states that the sum of x and 5 is less than 8, while the second inequality states that the sum of x and 5 is greater than 8.

To solve the first inequality, we need to isolate x by subtracting 5 from both sides of the inequality: x < 3. This means that any value of x that is less than 3 will satisfy the inequality.

To solve the second inequality, we need to isolate x by subtracting 5 from both sides of the inequality: x > 3. This means that any value of x that is greater than 3 will satisfy the inequality.

The solutions of the two inequalities differ in terms of the values of x that satisfy each inequality. The first inequality has a solution set that consists of all values of x less than 3, while the second inequality has a solution set that consists of all values of x greater than 3. Therefore, the solutions of the two inequalities do not overlap.

The second set of inequalities are x + 5 ≤ 8 and x + 5 ≥ 8. The first inequality states that the sum of x and 5 is less than or equal to 8, while the second inequality states that the sum of x and 5 is greater than or equal to 8.

To solve the first inequality, we need to isolate x by subtracting 5 from both sides of the inequality: x ≤ 3. This means that any value of x that is less than or equal to 3 will satisfy the inequality.

To solve the second inequality, we need to isolate x by subtracting 5 from both sides of the inequality: x ≥ 3. This means that any value of x that is greater than or equal to 3 will satisfy the inequality.

The solutions of the two inequalities in this case do overlap. The common solution is x = 3, which satisfies both inequalities since it is both less than or equal to 8 and greater than or equal to 8. Therefore, the solution set for both inequalities is x ≤ 3 and x ≥ 3, which can be written as x = 3.

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Therefore, the slope of the line passing through the given points is -1/2.

In mathematics, the slope is a measure of the steepness of a line. It refers to the ratio of the vertical change to the horizontal change between any two points on the line. The slope of a line is often denoted by the letter "m."

For a given line, the slope is calculated by taking any two points on the line, [tex](y_{1} ,y_{2}[/tex] and [tex](x_{1} ,x_{2}[/tex] and applying the formula:

slope [tex]m= (y_{2} -y_{1})/(x_{2}-x_{1})[/tex]

The slope can be positive, negative, zero, or undefined, depending on the direction and steepness of the line. A positive slope means that the line is increasing as you move from left to right, while a negative slope means that the line is decreasing. A zero slope means that the line is horizontal, and an undefined slope means that the line is vertical.

by the question.

To find the slope of the line passing through the given points, we can use the slope formula:

slope = (change in y)/(change in x)

Let's choose the first point (-8, -21) and the last point (10, -30) to calculate the slope:

change in y = -30 - (-21) = -9

change in x = 10 - (-8) = 18

slope = (-9)/18 = -1/2

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The  answers are sin angle R = ST/RT and sin angle L = 3(ST)/3(RT) Fοr the given questiοn trigοnοmetry.

Thus option A & B are correct.

Trigοnοmetric ratiοs are mathematical relatiοnships between the sides and angles οf a right triangle. The three main trigοnοmetric ratiοs are sine, cοsine, and tangent, abbreviated as sin, cοs, and tan.

The sine οf an angle is the ratiο οf the length οf the side οppοsite the angle tο the length οf the hypοtenuse. The cοsine οf an angle is the ratiο οf the length οf the adjacent side tο the length οf the hypοtenuse. The tangent οf an angle is the ratiο οf the length οf the οppοsite side tο the length οf the adjacent side. These ratiοs are useful in sοlving prοblems invοlving right triangles and have many applicatiοns in fields such as physics, engineering, and navigatiοn.

We knοw that when a triangle is dilated by a scale factοr οf k, all cοrrespοnding sides are multiplied by k, and all cοrrespοnding angles remain cοngruent.

Using this fact, we can determine the relatiοnships between the trigοnοmetric ratiοs οf the twο triangles:

A. Sin angle R = ST/RT is true fοr bοth triangles, as the sine οf an angle is defined as the ratiο οf the οppοsite side tο the hypοtenuse, which dοes nοt change when dilated.

B. Sin angle L = 3(ST)/3(RT)simplifies tο Sin angle L = ST/RT, which is true fοr bοth triangles (as shοwn in part A).

C. Sin angle R = 3(MN)/3(LM) simplifies tο sin angle R = MN/LM, which is nοt necessarily true. This is because the cοrrespοnding sides οf the triangles are nοt prοpοrtiοnal tο each οther.

D. Sin angle L = MN/NL is nοt necessarily true fοr the same reasοn as in part C.

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Answer:

Step-by-step explanation:

Answer:179 cm3

there you go :)

Step-by-step explanation:

Answer:

the correct answer is the second one

Step-by-step explanation:

I will add a photo of my solution, because there's a lot to type here

The statement "the coefficient of determination measures the variation in the dependent variable that is explained by the regression model" is true because coefficient of determination, or R-squared, measures the proportion of variance in the dependent variable that is explained by the independent variables in a regression model.

The coefficient of determination, or R-squared, is a statistical measure that evaluates the goodness of fit of a regression model. It quantifies the amount of variance in the dependent variable that can be explained by the independent variables in the model. R-squared ranges from 0 to 1, where a value of 0 means that none of the variation in the dependent variable is explained by the model, while a value of 1 indicates that all the variation is explained.

Therefore, R-squared is useful in assessing the predictive power of a model, and higher values are generally preferred. However, it is important to note that R-squared alone does not guarantee a good model, and other factors such as model assumptions and outliers should also be considered.

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Assuming that the function A calculates the surface area of a mold, the appropriate domain for A would be a set of all possible molds, which can be represented by a set of positive real numbers.

It is important to note that the mold's geometry, size, and complexity will affect the calculation of its surface area. Therefore, the domain of the mold area function A should include all possible variations of mold shapes and sizes.

In practical applications, the domain of A may also be limited by the manufacturing capabilities or constraints, such as the maximum size or complexity of molds that can be produced. In such cases, the domain of A may need to be further restricted to reflect these limitations.

Overall, the appropriate domain for the mold area function A would depend on the specific context and application of the function.

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A correlation coefficient is consistently a number between 1 and - 1 .

The correlation coefficient is a factual measure that demonstrates the strength and heading of the straight connection between two factors. It goes from - 1 to 1, where - 1 addresses a completely bad correlation (i.e., as one variable expands, different declines), 0 addresses no correlation, and 1 addresses an entirely sure correlation (i.e., as one variable builds, the other likewise increments).

The indication of the correlation coefficient demonstrates the heading of the relationship, while the extent of the coefficient shows the strength of the relationship. A correlation coefficient of 0 shows no straight connection between the factors, while values nearer to - 1 or 1 demonstrate a more grounded direct relationship.

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V = πr^2h

V = π7^2•18
V = π49•18

V = 2770.88472

= 2770.88472 • 0.004

= 11.083538

Thus, the container holds 11.08 gallons of juice.

A circle is a curve sketched out by a point moving in a plane. The measure of the angle is 72°.

A circle is a curve sketched out by a point moving in a plane so that its distance from a given point is constant; alternatively, it is the shape formed by all points in a plane that are at a set distance from a given point, the center.

Let the angle that turns through 1/5 of the circle be x.

We know that the measure of the center of a circle is 360°, while it is given that the angle turns through 1/5 of the circle. Therefore, the angle will turn 1/5 of 360°.

x = 1/5 of 360 = 72°

Thus, the measure of the angle is 72°.

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Check the picture below.

The point estimate for the percent who want to change the name of the town is 39.5%.

The poll's margin of error is 1. 5 %.

The town most likely will not change its name because the point estimate is less than half.

The point estimate for the percent who want to change the town's name is the midpoint of the interval [0.38, 0.41]. To find the midpoint, add the endpoints of the interval and divide by 2:

(0.38 + 0.41) / 2 = 0.79 / 2 = 0.395

So, the point estimate is 39.5%.

The margin of error is half the width of the interval. To find the width, subtract the lower endpoint from the upper endpoint and divide by 2:

(0.41 - 0.38) / 2 = 0.03 / 2 = 0.015

So, the margin of error is 1.5%.

Based on the given data, the town is most likely not going to change its name. The point estimate, 39.5%, is less than 50%, which indicates that less than half of the surveyed adults want to change the town's name. The margin of error (1.5%) is relatively small compared to the point estimate, which means that the true percentage is likely to be within 1.5% of the point estimate.

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Answer:

B

Step-by-step explanation:

-240 +65 = -175

(We use a -240 instead of 240 because it's below water.) :)

The measure of the angle that Zane is using the protractor is a 113 degrees.

Degree is the unit of measure of an angle and is measured by using the geometric tool - a protractor. A degree is denoted by the symbol '°'. A circle completely rotates at a 360° and a degree is a part of that 360° rotation as it is divided into 360 equal parts.

Therefore, The measure of the angle that Zane is using the protractor is a 113 degrees.

Hence, x = 4 is the only integer answer to the inequality as  the range of possible values for x is from 4 to 5.

A mathematical statement showing a connection that exists between values or statements that aren't always equal is known as an inequality. Inequalities compare two quantities using symbols like (less than), > (greater than), (less than or equal to), and (greater than or equal to). For instance, "y -3" denotes that the y value is more than or equal to -3, whereas "x 5" denotes that the x value is less than 5. A number line can be used to depict all the possible numbers that satisfy an inequality after it has been solved. In many different mathematical fields, including the solution of equations, the study of functions, and the definition of relationships between variables, inequality is used.

given

We can begin by finding the inequality's x:

3 < 3x - 3 ≤ 2x + 2

To add 3 to each of the inequality's three components, we get:

6 < 3x ≤ 2x + 5

When we deduct 2x from each of the inequality's three components, we obtain:

4 < x ≤ 5

Since we are seeking for integer answers, the range of possible values for x is from 4 to 5, with 5 being the exception. Hence, x may be:

x = 4

Hence, x = 4 is the only integer answer to the inequality as  the range of possible values for x is from 4 to 5.

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Answer: 420 in ³

Step-by-step explanation:

The Formula for finding the volume of a prism = Length x Breadth x Height

Volume of prism = 7 x 5 x 12

                            = 420 in³

There are 40,320 ways to place 8 distinguishable rooks on an 8 × 8 chessboard so that none can capture any other.

In order to place 8 distinguishable rooks on an 8 × 8 chessboard so that none can capture any other, we need to place one rook in each row and each column exactly once.

The first row can be filled in 8 ways, as there are 8 columns to choose from. The second row can be filled in 7 ways, as we cannot choose the column that has already been filled in the first row. Continuing in this way, we see that the number of ways to place 8 distinguishable rooks on an 8 × 8 chessboard is:

8! = 40,320

Therefore, there are 40,320 ways to place 8 distinguishable rooks on an 8 × 8 chessboard so that none can capture any other.

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Answer:

Step-by-step explanation:

add c with b and then add a multiply 30 and divide by 12

Answer:

24.3ft

Step-by-step explanation:

36.2ft - 15ft = 21.2ft

Cade height = 6.2 - 2.5 = 3.7

21.2 + 3.7 = 24.9ft

24.9ft - 15.6ft = 24.3ft

Answer:

354?

Step-by-step explanation:

Thats my guess around 354 6th graders are there in my school

The function y = ∛x  when transformed is added as an attachment

From the question, we have the following parameters that can be used in our computation:

y = ∛x

When the y values are multiplied by 1/2 the rule is

(x, 1/2y)

To transform the function y = ∛x by the point (x, 1/2y), we can use the following steps:

Therefore, the transformation by the point (x, 1/2y) is y = 2∛x

See attachment for the graph

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Answer: A

Step-by-step explanation:

The Y intercept is his base pay, because no matter what he is getting 38,000. So, his total salary will always start out at 38,000 then continue up with commission sales.

Answer:

To solve the equation 8x = -10y for the slope and y-intercept, we need to first rearrange it into the slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept.

To do this, we can divide both sides of the equation by -10, which gives us:

y = (-8/10)x

Simplifying further, we get:

y = (-4/5)x

Therefore, the slope of the line represented by this equation is -4/5. This means that for every increase of 1 in x, y decreases by 4/5.

To find the y-intercept, we can set x to 0 and solve for y:

y = (-4/5)(0)

y = 0

Thus, the y-intercept is 0.

In summary, the slope of the line represented by 8x = -10y is -4/5 and its y-intercept is 0.

Step-by-step explanation:

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Answer: x=5y/4

Step-by-step explanation:

8x=10y

Divide both sides by 8

8x/8 = 10y/8

8x divided by 8, will cancel out resulting in x.

So, your final answer will be x=5y/4

Answer:

The Summer Blue Uniform.

Step-by-step explanation:

NJROTC contains many different policies and guidelines for cadets.