A group of children made 1,200 snowflakes in 3 days. They made 30% of the snowflakes on the first day of the project. On the second day, they made 20% more than they had the previous day. How many snowflakes did the children make on the third day?

Answer:

The best way to decompose the composite figure to determine its area is as a semicircle, a trapezoid, and two rectangles. This way, we can use the following formulas to find the area of each part:

Area of a semicircle = 21​πr2, where r is the radius of the circle.

Area of a trapezoid = 21​(b1​+b2​)h, where b1​ and b2​ are the bases and h is the height of the trapezoid.

Area of a rectangle = l×w, where l is the length and w is the width of the rectangle.

Then, we can add up the areas of each part to find the total area of the composite figure. The other options are not as convenient because they either involve more parts or more complicated shapes. For example, option A would require finding the area of a triangle, which involves using trigonometry or the Pythagorean theorem. Option B would require finding the area of four triangles, which is more tedious than finding the area of two rectangles. Option C would require finding the area of a square, which is redundant because a square is a special case of a rectangle.

Step-by-step explanation:

The composite figure can be decomposed into a semicircle, a trapezoid, and two rectangles.

Option D is the correct answer.

It is a quadrilateral that has one pair of parallel sides and a height.

The area is calculated as: 1/2 x sum of the parallel sides x height.

Examples:

Area of a trapezium that has the parallel sides as 3 cm and 4 cm and a heght o 5 cm.

Area = 1/2 x (3 + 4) x 5

Area = 1/2 x 7 x 5

Area = 35/2 = 17.5 cm^2

We have,

The given figure can be decomposed into the following figure.

- Semicircle

- Trapezoid

- Two rectangles

Thus,

A semicircle, a trapezoid, and two rectangles.

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The z-score of the customer that just turned 25 years old is  -1.45. The z-score for an age of 75 years is approximately 2.17, which is greater than 2,  Since a z-score greater than 2 represents a considerable deviation.

(a)

To find the z-score for a customer that just turned 25 years old :

z-score = (x - mean) / standard deviation

Plugging in the values, we get:
z-score = (25 - 45) / 13.8 = -1.45, where x = 25 years, mean  = 45 years, and standard deviation = 13.8 years.
Rounding to the nearest hundredth, the z-score is -1.45.

(b)

To find an example of a customer age with a z-score greater than 2, we need to identify an age that deviates significantly from the mean given the standard deviation. Since a z-score greater than 2 represents a considerable deviation, let's consider an age of 75 years.

Using the same formula as before:

z = (x - μ) / σ

where:

   x is the customer's age (75 years),

   μ is the mean of the distribution (45 years),

   σ is the standard deviation of the distribution (13.8 years).

Calculating the z-score:

z = (75 - 45) / 13.8

z = 2.17

The z-score for an age of 75 years is approximately 2.17, which is greater than 2, fulfilling the requirement of the question.

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Answer:

Refexive I think

Step-by-step explanation:

5(3) = 3(5)

or

x(y) = y(x)

I found this

"Anything equals itself: this is the "reflexive" (reflecting onto itself) property. Also, it doesn't matter which order the equality is in; if x = y, then y = x: this is the "symmetric" (they match) property."

Answer:

can you show the graphs, and i will be able to answer it

Answer:

B on edge.

Step-by-step explanation:

The number line is B (closed circle at -5, opened circle at 5)

Answer:

£65

Step-by-step explanation:

1235 / 19 = 65

(Meeting character limit)

Answer:

Spanish

28

25

20

Step-by-step explanation:

The sum of French and Spanish has to equal 36, so just do 36- ( people in french). You didn't mention what gender has to do with it so I didn't include anything

Employing a quantitative approach to research on child obesity involves using numerical data and statistical analysis to investigate the relationship between child obesity and adult obesity.

When employing a quantitative approach, researchers collect numerical data through methods such as surveys, measurements, or observations. In the context of studying child obesity and its connection to adult obesity, researchers might collect data on factors like body mass index (BMI), age, gender, lifestyle habits, and other relevant variables. They can then analyze this data using statistical techniques to determine patterns, correlations, and associations between child obesity and the likelihood of adult obesity.

Data analysis in quantitative research involves several steps. First, researchers clean and organize the collected data to ensure accuracy and consistency. Then, they apply statistical methods such as correlation analysis, regression analysis, or chi-square tests to examine the relationship between child obesity and adult obesity. The analysis can provide insights into the strength and direction of the relationship, potential confounding factors, and the significance of the findings.

By employing a quantitative approach and conducting data analysis, researchers can generate empirical evidence regarding the relationship between child obesity and adult obesity. This approach allows for rigorous examination of large datasets, statistical inference, and the identification of trends or patterns that can contribute to understanding and addressing the issue of obesity throughout the life course.

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The solution for the equation is,

1. x = 2 and y = 1

2. no solution

3. y = 0 and x = 11

4. x = 4/3 and y = 10/3

How do linear equations work?

Since each term in a linear equation has an exponent of 1, graphing an algebraic equation always yields a straight line. It is called a "linear equation" because of this.

There are linear equations with one variable and those with two variables.

Given sets of equations,

1. x - y = 1

x + y = 3

add both the equations we get,

x - y + x + y = 1 + 3

2x = 4 (+y and -y eliminated)

x = 4/2 = 2

substitute value of  x

x + y = 3

2 + y = 3

y = 3 - 2 = 1

x = 2 and y = 1

2.  x + y = 1

x + y = 11

The two lines that are used to symbolize the equations in this instance are parallel, hence the problem has no solution.

3. x + 4y = 11

x - 6y = 11

We may remove the equations since x is a common constant in both equations.

x + 4y -(x - 6y) = 11 - 11

4y + 6y = 0

y = 0 and x = 11

4. -3x + 3y = 6

6x + 3y = 18

subtract equation 1 from 2

6x + 3y -(-3x + 3y) = 18 - 6

6x - 3y + 3x - 3y = 12

9x = 12

x = 12/9 = 4/3

substitute value of x

-3x + 3y = 6

-3(4/3) + 3y = 6

-4 + 3y = 6

y = 10/3

Hence the solution is 1. x = 2 and y = 1

2. no solution,

3. y = 0 and x = 11

4. x = 4/3 and y = 10/3.

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Answer:

3.26

Step-by-step explanation:

33.5/3.14 = 10.66 ( when rounded to the nearest tenth).

10.66 square rooted is 3.26

The required radius of the sphere is 2 inch.

Volume of sphere = 33.5 cubic inches . Radius of sphere to be determine.

Volume, is defined as mass gained per unit cube of density.

Here, area of sphere = \(4/3\pi r^3\)

                         33.5 = 4/3 πr³
                              r³ = 33.5 * 3/4π
                              r  = 2

Thus, the required radius of the sphere is 2 inch.

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the criteria used when deciding upon the inclusion of a variable are A - Theory, B - t-statistic, C - Bias, and D - Adjusted R^2.

When deciding upon the inclusion of a variable, the following criteria are commonly used:

A - Theory: Theoretical justification is often considered to include a variable in a model. It involves assessing whether the variable is relevant and aligns with the underlying theory or conceptual framework.

B - t-statistic: The t-statistic is used to determine the statistical significance of a variable. A variable with a significant t-statistic suggests that it has a meaningful relationship with the dependent variable and may be included in the model.

C - Bias: Bias refers to the presence of systematic errors in the estimation of model parameters. It is important to consider the potential bias introduced by including or excluding a variable and assess whether it aligns with the research objectives.

D - Adjusted R^2: Adjusted R^2 is a measure of the goodness of fit of a regression model. It considers the trade-off between the number of variables included and the overall fit of the model. Adjusted R^2 helps in assessing whether the inclusion of a variable improves the model's explanatory power.

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Answer:

\(\sin E=\dfrac{4}{5}\)

Step-by-step explanation:

To find the value of sin E we can use the sine trigonometric ratio.

\(\boxed{\begin{minipage}{9 cm}\underline{Sine trigonometric ratio} \\\\$\sf \sin(\theta)=\dfrac{O}{H}$\\\\where:\\ \phantom{ww}$\bullet$ $\theta$ is the angle. \\ \phantom{ww}$\bullet$ $\sf O$ is the side opposite the angle. \\\phantom{ww}$\bullet$ $\sf H$ is the hypotenuse (the side opposite the right angle). \\\end{minipage}}\)

From inspection of the given right triangle:

Substitute these values into the sine ratio:

\(\sin E=\dfrac{4}{5}\)

Answer:

yeah its 93 after being rounded

Step-by-step explanation:

already did it and commented i was just wondering what else there was cause it seemed like there was more.

Answer:

it should take the workers 18 days to finish

Step-by-step explanation:

The missing elements are: Radius = 19 inches, Circumference = 119.32 inches and Area = 1133.54 square inches

The radius of a circle is half the diameter of the same circle.

The diameter is 38 inches.

This means that the radius is 19 inches

The circumference is calculated as:

C = 2πr

C = 2 × 3.14 × 19

C = 119.32

Area will be:

= πr²

= 3.14 × 19²

= 1133.54

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Answer:

13in

Step-by-step explanation:

remember it's the same angle width.

Answer:

A & C

Step-by-step explanation:

Factors of 18 : 1, 2, 3, 6, 9, 18

18

/\

2 9

/\

3 3

Prime factorization : 18 = 2x3x3

18

/\

3 6

/\

2 3

Prime factorization : 18 = 3x2x3

The solution set of the example inequality, 2•x + 3 ≤ -3, is the option;

A possible inequality that can be used to get one of the options, (the inequality is not included in the question) is as follows;

Solving the above inequality, we have;

2•x + 3 ≤ -3

2•x ≤ -3 - 3 = -6

2•x ≤ -6

Therefore;

x ≤ -6 ÷ 2 = -3

x ≤ -3

Which gives;

-∞ < x ≤ -3 in interval notation is (-∞, -3]

The solution set of the inequality, 2•x + 3 ≤ -3, is therefore the option;

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True, parabola consists of all the set of points that are equidistant from the fixed point and the fixed line.

As given in the question,

Given statement is: Parabola consist of set of all the points which are equidistant from fixed point and fixed line.

Therefore, parabola consists of all the set of points that are equidistant from the fixed point and the fixed line is a true statement.

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Answer:

The correct answer is A

Step-by-step explanation:

hope it will help you

Answer: 36

Step-by-step explanation:

Multiply and round up from 35.9 to 36

Answer:

-4

Step-by-step explanation:

-2 + -2 = -4

Answer:

-2)+(-2)= -4

Step-by-step explanation:

Miku Nakano here

Answer:

A

Step-by-step explanation:

oh, I think you mean

16a⁶ - 25b²

then A is the correct answer.

(4a³ + 5b)(4a³ - 5b) = 16a⁶ - 20a³b + 20a³b - 25b² =

= 16a⁶ - 25b²

correct.

In the triangle, The measure of side n is √ 108

It belongs to the basic geometric forms. A triangle having vertices A, B, and C is known as triangle ABC. Any three locations in Euclidean geometry that are not collinear result in a separate triangle and a distinct plane.

Identical sides have the same ratio since all of the triangles in the example are comparable.

Short side/long side:

n/6 = 18/n

n² = 6*18

n² = 108

n = √ 108

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Answer:

A = 11²/{4π}

Step-by-step explanation:

The circumference equation is C = 2πr.  Thus, r = C / (2π), and:

         C²                                                   (22π)²          2²11²π²             11²  

r² = ----------     so, if C = 22π units, r² = -------------- = ---------------- = -------------

       (2π)²                                                    (2π)^4        (2π)²(2π)²       (2π)²

             11²π²

or  r² = ---------------

The area equation for a circle is A = πr² which here is π·11²/(2π)²

This reduces to 11²/{4π}

Answer:

20%

Step-by-step explanation:

if the 100% of the price is $250 and the discount is $50 then to find what percent $50 we multiply 100 by 50 then divide it with 250

100 × 50 ÷ 250 = 20

Answer:

Z+12a−z+8+12−+8

Step-by-step explanation:

Z+8−6(z−2a)+5z

+8−6(−2)+5

Z+8−6(−2a+z)+5z

+8−6(−2+)+5

Z+8−6(−2a+z)+5z

+8−6(−2+)+5

Z+8+12a−z+8+12−

Answer:

Z + 8 + 12a − z

12a + 8

Step-by-step explanation:

The equation of the linear function that fits the given data is y = 10x - 2.

To find the equation of a linear function in slope-intercept form, we need to determine the slope (m) and y-intercept (b).

m = (y2 - y1) / (x2 - x1)

(x1, y1) = (0, -2)

(x2, y2) = (4, 38)

m = (38 - (-2)) / (4 - 0)

= 40 / 4

= 10

y = mx + b

To find the y-intercept, we can use any point on the line. Let's use (0, -2):

-2 = 10(0) + b

b = -2

So,

y = 10x - 2

We can check that this equation satisfies all the given data points:

When x = 0, y = 10(0) - 2 = -2

When x = 1, y = 10(1) - 2 = 8

When x = 2, y = 10(2) - 2 = 18

When x = 3, y = 10(3) - 2 = 28

When x = 4, y = 10(4) - 2 = 38

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Answer:

7

Step-by-step explanation:

This is the value of "f(x)"  when "x = 0" .

The triangles are not similar.

Two triangles are similar if they have the same ratio of corresponding sides and equal pair of corresponding angles.

The Given triangle ZXB and DZN are not similar

Because,

XZ/DZ =XB/DN ≠ ZB /BN

XZ/DZ = 1/2

XB/DN = 1/2

ZB /BN = 1/3

Hence, the triangles are not similar.

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Answer:

hi my name is beautiful and my friend is r Royal family and my dad have a great weekend and we know can call me when you get home from school so many questions