calculate 50% of 200

Answer:

123 cm3

Step-by-step explanation:

hope it helped!!!

The ratio of the number of unshaded to shaded squares is 7 : 3.

Ratio is defined as the relationship between two quantities where it tells how much one quantity is contained in the other.

It is also defined as the fraction of one quantity with respect to other.

The ratio of a and b is denoted as a : b.

Given is a grid of squares which is given below.

Total number of squares = 10

Of that,

Number of shaded squares = 3

Number of unshaded squares = 7

We have to find the ratio of unshaded to shaded squares in the grid which is 7 / 3 or 7 : 3.

Ratio of unshaded squares to shaded squares = 7 : 3

Hence 7 : 3 is the ratio of unshaded to shaded.

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The 4 properties of the rhombus are:

A quadrilateral in Euclidean geometry is a rhombus. It's a parallelogram with all sides equal and diagonals intersecting at 90 degrees. In addition, opposing sides are parallel, and opposing angles are equal. This is a fundamental property of the rhombus. A rhombus is shaped like a diamond. As a result, it's also known as a diamond.

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Answer:

I think 13 is C

Step-by-step explanation:

71+52= 123

180-123= 57

A randomized experiment would be the best design for determining the relationship between cell phone use and brain cancer.

In a randomized experiment, individuals are randomly assigned to either a cell phone use group or a non-cell phone use group, and then the incidence of brain cancer is compared between the two groups.

This type of study can establish causality because it eliminates the possibility of confounding variables and ensures that any observed difference in brain cancer incidence is truly due to cell phone use and not some other factor.

Additionally, randomized experiments provide more robust results than observational studies, as they reduce the potential for selection bias and allow for control over extraneous variables.

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Comparingthe F-ratio of 4.60 to these critical values, we see that it is greater than the value for α = .05, but less than the value for α = .01. Therefore, the correct statistical decision is to reject the null hypothesis with α = .05, but not with α = .01. Option a) is the correct answer.

An independent-measures analysis of variance (ANOVA) is a statistical test used to evaluate the mean differences between two or more groups. In this case, we are comparing four treatments, each with a separate sample of n = 8.

The null hypothesis for an ANOVA is that there are no significant differences between the means of the groups being compared. The alternative hypothesis is that at least one of the means is different from the others.

To test this hypothesis, we use an F-ratio, which is the ratio of the variance between groups to the variance within groups. If the F-ratio is large enough, we can reject the null hypothesis and conclude that there are significant differences between the means.

In this case, the data produce an F-ratio of F = 4.60. To make a statistical decision, we need to compare this value to a critical value from an F-distribution table. The critical value depends on the degrees of freedom for the numerator and denominator of the F-ratio, as well as the level of significance (α) chosen for the test.

Since we have four groups, the numerator degrees of freedom are k-1 = 3, where k is the number of groups. The denominator degrees of freedom are (k-1)(n-1) = 21, where n is the sample size for each group.

For a two-tailed test with α = .05, the critical F-value for these degrees of freedom is 3.10. For α = .01, the critical value is 5.10.

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Answer:Cell content

Started at 20° and dropped 4° each minute                      -4

Cell content

Started at −20° and rose 1° each minute                              1

Cell content

Started at 20° and dropped 1° each minute                       -1

Cell content

Started at −20° and rose 4° each minute                             1

Step-by-step explanation:

Answer:

Cell content

Started at 20° and dropped 4° each minute                      -4

Cell content

Started at −20° and rose 1° each minute                              1

Cell content

Started at 20° and dropped 1° each minute                       -1

Cell content

Started at −20° and rose 4° each minute                             1

Step-by-step explanation:

The value of x from the system of equation is 0

Given the systems of equation

–3x + 8y = 16

3x + 4y = 8

Using the elimination method.

Add both equations

-3x + 3x + 8y + 4y = 16 + 8

12y = 24

y = 24/12

y = 2

Substitute y = 2 into equation 2:

3x + 4y = 8

3x + 4(2) = 8

3x = 8 - 8

3x = 0

x = 0

Hence the value of x from the system of equation is 0.

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If the confidence coefficient reduces to 0.90, the confidence interval for μ becomes narrower.

What is an Interval estimation?

Interval estimation in statistics refers to the use of sample data to calculate an interval of likely values for an interesting parameter.

What is Mean?

It's obtained by simply dividing the sum of all values in a data set by the number of values. The calculation can be done from raw data or for data aggregated in a frequency table.

In interval estimation, as the sample size becomes larger, the interval estimate becomes narrower.

A 95% confidence interval for population mean is determined to be 100 to 120.

If the confidence coefficient reduces to 0.90, the confidence interval for μ becomes narrower.

Hence the answer is If the confidence coefficient reduces to 0.90, the confidence interval for μ becomes narrower.

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Answer:

You can downl⁣oad the answer here. Link below!

Answer:

c

Step-by-step explanation:

Answer:

(-1, -4.5)

(-1.5, -2.5)

Step-by-step explanation:

To find the midpoint add the coordinates and divide by 2

19.( -8,-2) (6,-7)

((-8+6)/2, (-2+-7)/2) = (-2/2, -9/2) = (-1, -4.5)

20. ( 6,5) (-8,-10)

(( 6+-8)/2 , (5-10)/2) = (-3/2,-5/2) = (-1.5, -2.5)

Answer:

19. (-1, -4.5)

20. (-1, -2.5)

Step-by-step explanation:

19.

Use the midpoint formula.

\(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\)

Substitute the values.

\(\frac{-8+6}{2},\frac{-2-7}{2}\)

Add/Subtract the numerators.

\(\frac{-2}{2},\frac{-9}{2}\)

Divide.

-1, -4.5

20.

Use the midpoint formula.

\(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\)

Substitute the values.

\(\frac{6-8}{2},\frac{5-10}{2}\)

Add/Subtract the numerators.

\(\frac{-2}{2},\frac{-5}{2}\)

Divide.

-1, -2.5

Answer:

x^2 - 9

Step-by-step explanation:

The square root of the quadratic equation \((x^2 -6x+ 9)\) if x<-3 would be equal to (x-3).

A quadratic equation is the second-order degree algebraic expression in a variable. the standard form of this expression is  ax² + bx + c = 0 where a. b are coefficients and x is the variable and c is a constant.

The given quadratic equation is

\((x^2 -6x+ 9)\)

We have to find the square root of the quadratic equation

\(\sqrt{(x^2 -6x+ 9)} \\\\\sqrt{(x^2 -3x-3x+ 9)} \\\\\sqrt{x(x-3)-3 (x-3)} \\\\\sqrt{(x-3) (x-3)} \\\\\sqrt{(x-3)^2} \\\\(x-3)\)

Thus, the square root of the quadratic equation \((x^2 -6x+ 9)\) if x<-3 would be equal to (x-3).

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we find that the numerical approximation using Euler's method gives y(2) ≈ 1.865, while the analytical solution gives y(2) = 2.5.

Using the formula y(n+1) = y(n) + Δx * f(x(n), y(n)), where f(x, y) = x² √y, we can calculate the values of y at each step. Here's the step-by-step calculation:

Step 1: For x = 0, y = 1 (initial condition).

Step 2: For x = 0.2, y = 1 + 0.2 * (0.2)² * √1 = 1.008.

Step 3: For x = 0.4, y = 1.008 + 0.2 * (0.4)² * √1.008 = 1.024.

Step 4: For x = 0.6, y = 1.024 + 0.2 * (0.6)² * √1.024 = 1.052.

Step 5: For x = 0.8, y = 1.052 + 0.2 * (0.8)² * √1.052 = 1.094.

Step 6: For x = 1.0, y = 1.094 + 0.2 * (1.0)² * √1.094 = 1.155.

Step 7: For x = 1.2, y = 1.155 + 0.2 * (1.2)² * √1.155 = 1.238.

Step 8: For x = 1.4, y = 1.238 + 0.2 * (1.4)² * √1.238 = 1.346.

Step 9: For x = 1.6, y = 1.346 + 0.2 * (1.6)² * √1.346 = 1.483.

Step 10: For x = 1.8, y = 1.483 + 0.2 * (1.8)² * √1.483 = 1.654.

Step 11: For x = 2.0, y = 1.654 + 0.2 * (2.0)² * √1.654 = 1.865.

Therefore, using Euler's method with a step size of Δx = 0.2, we approximate y(2) to be 1.865.

To obtain the analytical solution to the ODE, we can separate variables and integrate both sides:

∫(1/√y) dy = ∫x² dx

Integrating both sides gives:

2√y = (1/3)x³ + C

Solving for y:

y = (1/4)(x³ + C)²

Using the initial condition y(0) = 1, we can substitute x = 0 and y = 1 to find the value of C:

1 = (1/4)(0³ + C)²

1 = (1/4)C²

4 = C²

C = ±2

Since C can be either 2 or -2, the general solution to the ODE is:

y = (1/4)(x³ + 2)² or y = (1/4)(x³ - 2)²

Now, let's evaluate y(2) using the analytical solution:

y(2) = (1/4)(2³ + 2)² = (1/4)(8 + 2)² = (1/4)(10)² = 2.5

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The rate of discount is approximately 6.4%.

Given that, the purchase at the store "Tias" come to $428.85 before any discounts and before any taxes.

The total price after a discount and taxes of 13% was $452.98.

The formula to find out the rate of discount is `tag=(1+r*t)(1-r*j)*p`, where `tag` is the total price after a discount and taxes, `p` is the initial price, `r` is the rate of discount, `t` is the tax rate, and `j` is the rate of tax.

So we can say that `452.98=(1-r*0.13)(1+r*0)*428.85`

On solving, we get, `r≈6.4%`

Hence, the rate of discount is approximately 6.4%.

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Answer:

h = 2 and k = 1.5

Step-by-step explanation:

The solution is, Solve of the system of equations. using elimination,

6h=2k+9 & 3h+4k=12 is, h = 2 & k=3/2.

An equation is a  mathematical statement that is made up of two expressions connected by an equal sign.  In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.

here, we have,

given that, the system of equations.

6h-2k=9.......(1)

3h+4k=12 ...........(2)

now, for solving, multiply (1) by 2 & add with  (2),

we get,

12h - 4k = 18

3h + 4k = 12

---------------------

15h = 30

i.e. h = 2

from (1), we get, k = 3/2

Hence, The solution is, Solve of the system of equations. using elimination,

6h=2k+9 & 3h+4k=12 is, h = 2 & k=3/2.

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Answer:

1. Locate the y-intercept on the graph and plot the point.

2. From this point, use the slope to find a second point and plot it.

3. Draw the line that connects the two points.

Answer:

13.24 ft

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

1. You have:

Sinα=opposite/hypotenuse

α=62°

opposite=x

hypotenuse=15 ft

2. When you substitute the values into  Sinα=opposite/hypotenuse, you obtain:

Sinα=opposite/hypotenuse

Sin(62°)=x/15

3. You must clear "x", as below:

x=(15)(Sin(62°))

x=13.24 ft

The answer is. 13.24 ft

Answer:

-7, 14, 21, and 42

Step-by-step explanation:

7•-1=-7

7•2=14

7•3=21

7•6=42

Step-by-step explanation:

Let r be the common root of the given equations.

Then we have:

ar³ + 4r² - 5r - 10 = 0 ...(1)

and

ar³ - 9r - 2 = 0 ... (2)

Subtracting equation (2) from equation (1), we get:

13r² - 3r - 8a = 0

Solving for r using quadratic formula, we get:

r = [3 ± sqrt(9 + 52a)]/26

For r to be a real number, the discriminant of the quadratic expression inside the square root must be non-negative:

9 + 52a ≥ 0

Solving for a, we get:

a ≥ -9/52

Therefore, the possible values of a are all real numbers greater than or equal to -9/52.

Answer:

i think -0.02

Step-by-step explanation:

Answer:

-2.0

Step-by-step explanation:

Using the order of operations, the expression can be simplified as  

9 + 1.34 + 62.88 = 73.22

The order of operations instructs us on how to solve steps in multi-step expressions. Any operations contained within parenthesis or brackets are first solved. After that, we handle any exponents. Third, we perform all division and multiplication operations from left to right. Fourth, all addition and subtraction problems are solved from left to right.

Remember PEMDAS when simplifying multi-step expressions, i.e.:

P (Parentheses)

E (Exponents, Powers and Square Roots)

MD (Multiplication and Division, left-to-right)

AS (Addition and Subtraction, left-to-right)

The expression given in the problem is:  9 + 1.34 + 1 2 (3.50 +1.74)

Apply the above operation order:

Step 1: solve the addition inside the parenthesis

9 + 1.34 + 1 2 (3.50 +1.74)  =  9 + 1.34 + 1 2 (5.24)

Step 2: Multiply the result by 12

9 + 1.34 + 1 2 (5.24) = 9 + 1.34 + 62.88

Step 3: Apply addition from left to right

9 + 1.34 + 62.88 = 73.22

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Answer:

2.5

Step-by-step explanation:

it is recommended that the data members of a class should be declared as private True, it is recommended that the data members of a class should be declared as private.

Private data members can only be accessed within the class, which provides better control over data integrity and prevents unauthorized access or modification from outside the class. It also enables encapsulation, which allows changes to be made to the implementation of a class without affecting other parts of the program.

In summary, it is best practice to declare data members as private in a class to enhance data security and maintain encapsulation.

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The length of the segment BE is 2 units.

A quadrilateral with parallel sides that are equal to one another and four equal vertices is known as a rectangle.

Given:

Quadrilateral ABCD is a rectangle.

BE=3x−7 and AC=8x−20.

E is the intersection point of the diagonals.

So,

AC/2 = BE

(8x−20)/2 = 3x−7

4x - 10 = 3x - 7

x = 3

So, BE = 2

Therefore, BE = 2 units.

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Answer:

44 square units

Step-by-step explanation:

If you find the area for the individual parts of the shape, you will eventually end up adding each area to get the overall area of the shape. Hope this helps and good luck with this assignment :)

Answer:

(a)parallel

Step-by-step explanation:

they have the same slope so they're parallel