HELP HELP HELP ILL MARK BRAINLIEST

Answer:

C is correct

Step-by-step explanation:

I just know this from having previously learned it, I'm not sure how to explain it but hope the answer helps!

Answer:

xxxxxxzzzjjznzjsbsbsbshj

Step-by-step explanation:

sekjxhxjdjdknxxbbxjdkekmdkdkddo

The number of small boxes purchased = 4

and the number of large boxes purchased = 9

According to the given question, a contractor needs to buy nails to build a house.

The nails come in small boxes and large boxes. Each small box has 50 nails and each large box has 350 nails. The contractor bought a total of 13 boxes that have 3350 nails altogether.

Let x be the number of small boxes and y be the number of large boxes.

The contractor bought a total of 13 boxes that have 3350 nails altogether.

x + y = 13                     ...............(1)

50x + 350y = 3350              ..........(2)

We solve above system of equations.

From equation (1),

x = 13 - y             ...........(3)

Substitute x = 13- y in equation (2)

50(13 - y) + 350y = 3350    

650 - 50y + 350y = 3350

300y = 2700

y = 9

Substitute above value of y in equation (3),

x = 13 - 9

x = 4

Therefore, the number of small boxes purchased = 4

and the number of large boxes purchased = 9

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The pharmacist should mix 9 g of a power to make a larger amount of the medicine

To solve this problem, we have to state the equation using the information of the problem

Information about the problem:

Calculating the rate of the medicine with the 1st mixed:

rate = mass(1)/ volume(1)

rate = 5g / 45cm3

rate = 0.11 g/cm3

Calculating how much power the pharmacist needs for the volume(2):

mass(2) = rate * volume(2)

mass(2) = 0.11 g/cm3 * 81 cm3

mass(2) = 9 g

We can say that they are the set of numbers and symbols that are related by the different mathematical operation signs such as addition, subtraction, multiplication, division among others.

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Green's Theorem can be defined as the relationship between a line integral and a double integral over a plane region. It is named after the mathematician George Green. Gauss's Divergence Theorem can be defined as the relationship between a flux integral and a triple integral over a region.

Here, we need to verify Green's Theorem in the plane for the vector field F = xy i + x² j and where C is the boundary of the region between the graphs of y = x²

and y = 1.

Stokes's Theorem states that a line integral of a vector field around a closed loop is equal to a surface integral of the curl of the vector field over the surface bounded by the loop. The surface integral of the curl over S is∫∫S (curl F).dS= ∫∫S (-2i - 2j - 2k).(√(2 - 2x² - 2y²) dA)= -2 ∫∫S √(2 - 2x² - 2y²) dA We can change to polar coordinates to evaluate the integral. In polar coordinates, the integral becomes∫(0,2π)∫(0,1) √(2 - 2r²) r drdθ= 2π/3

Hence, by Stokes's Theorem, the line integral of F around any closed curve C in S is equal to -2π/3 times the area enclosed by C. Gauss's Divergence Theorem can be defined as the relationship between a flux integral and a triple integral over a region. Here, we need to verify the Gauss Divergence Theorem for F = xy² i + yx² j + ek for the solid region D bounded by z = √(x² + y²) and z = 4.The divergence of F is∇. F = (∂P/∂x + ∂Q/∂y + ∂R/∂z)

= y² + x²

Since the region D is a solid, we need to use the divergence theorem in its integral form:∫∫S F.N dS = ∫∫∫D ∇.F dV Here, S is the surface of the solid D and N is the outward unit normal vector to S. the Gauss Divergence Theorem is verified for the given F and region D.

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Answer: 17.33 minutes

Step-by-step explanation:

To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.

time = distance/speed

45/13= 0.288888

0.288888 * 60 (for minutes) = 17.33

Step-by-step explanation:

To find the percentage increase, we use the following formula:

percentage increase = (new value - old value) / old value * 100%

In this case, the old value is 25 and the new value is 86. So, we can plug these values into the formula:

percentage increase = (86 - 25) / 25 * 100% = 244%

Therefore, the percentage increase from 25 to 86 is approximately 244%.

Answer:

244% increase

Step-by-step explanation:

Answer: x^6+6x^4+8x^2+2

Step-by-step explanation:

Since g comes after f then you will take g's equation and plug it into the f equation so it would turn out to be if you plugged it in

(x^2+2)^3-4(x^2+2)+2 which would equal x^6+6x^4+8x^2+2

Answer:

Its's 96

Step-by-step explanation:

2x + 6 is equal to 96

The surface area and volume of a pentagonal prism is  5/2 × a² × √(5 + 2√5) + 5ab and (1/4) × (5 + 2√5) × a² × h respectively. We can find the solution in the following manner.

A pentagonal prism is a three-dimensional geometric shape that consists of two parallel pentagons as the top and bottom faces, and five rectangular faces connecting them.

To find the surface area and volume of a pentagonal prism, we need to know its height, the length of the sides of the pentagon, and the length of the rectangular faces.

Let's denote the height of the pentagonal prism as "h", the side length of the pentagon as "a", and the length of the rectangular face as "b".

Surface Area of a Pentagonal Prism:

The surface area of a pentagonal prism is the sum of the areas of its faces. There are two pentagonal faces and five rectangular faces in a pentagonal prism.

Area of each pentagonal face = 5/4 × a² × √(5 + 2√5)

Area of each rectangular face = a × b

Total surface area = 2 × Area of pentagonal face + 5 × Area of rectangular face

= 5/2 × a² × √(5 + 2√5) + 5ab

Volume of a Pentagonal Prism:

The volume of a pentagonal prism is given by the formula:

Volume = (1/4) × (5 + 2√5) × a² × h

Therefore, the surface area and volume of a pentagonal prism can be calculated using the above formulas, given the values of a, b, and h.

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The surface area and volume of a pentagonal prism is sum of the areas of its faces, and (1/4) × (5 + 2√5) × a² × h.

A pentagonal prism is a three-dimensional geometric shape that consists of two parallel pentagons as the top and bottom faces, and five rectangular faces connecting them.

Surface Area of a Pentagonal Prism:

The surface area of a pentagonal prism is the sum of the areas of its faces. There are two pentagonal faces and five rectangular faces in a pentagonal prism.

Total surface area = 2 × Area of pentagonal face + 5 × Area of rectangular face

Volume of a Pentagonal Prism:

The volume of a pentagonal prism is given by the formula:

Volume = (1/4) × (5 + 2√5) × a² × h

Therefore, the surface area and volume of a pentagonal prism can be calculated using the above formulas, given the values of a, b, and h.

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If we use a 95% confidence level instead of a 90% confidence level, the confidence interval calculation from the same data will produce an interval wider than (0.26, 0.30).

In this question we have been given that a random sample of 1000 mosquitoes, 280 of them carried west nile virus. the 90% confidence interval for the true proportion of west nile virus infected mosquitoes is (0.26, 0.30).

We need to determine if we use a 95% confidence level instead of a 90% confidence level, whether the confidence interval calculation from the same data produce an interval wider than (0.26, 0.30) or not.

We know that the greater the confidence level, the wider the confidence interval.

This means, if we use a 95% confidence level instead of a 90% confidence level, the confidence interval calculation will produce the wider interval.

Therefore, for given sample 95% confidence interval calculation will produce the wider interval.

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The confidence interval for the given numbers, with a sample proportion of 0.88 and a confidence level of 0.94, is approximately (0.798, 0.962) when rounded to two decimal places.

To calculate the confidence interval for a random sample with a sample proportion of 0.88 and a confidence level of 0.94, we can use the formula:

\[ \text{Confidence Interval} = \text{Sample Proportion} \pm \text{Margin of Error} \]

The margin of error can be calculated using the formula:

\[ \text{Margin of Error} = \text{Critical Value} \times \text{Standard Error} \]

The critical value can be obtained from the Z-table or calculated using the inverse cumulative distribution function for the standard normal distribution.

Since the level of difficulty is set to 2, we can assume a two-tailed test. The critical value for a 94% confidence level with a two-tailed test is approximately 1.99.

The standard error can be calculated using the formula:

\[ \text{Standard Error} = \sqrt{\frac{\text{Sample Proportion} \times (1 - \text{Sample Proportion})}{\text{Sample Size}}} \]

Plugging in the values:

Sample Proportion (\( p \)): 0.88

Sample Size (\( n \)): 53

Confidence Level: 0.94

Critical Value (\( z \)): 1.99

We can calculate the standard error:

\[ \text{Standard Error} = \sqrt{\frac{0.88 \times (1 - 0.88)}{53}} \]

Now, we can calculate the margin of error:

\[ \text{Margin of Error} = 1.99 \times \text{Standard Error} \]

Finally, we can calculate the confidence interval:

\[ \text{Confidence Interval} = 0.88 \pm \text{Margin of Error} \]

Calculating the values:

Standard Error ≈ 0.041

Margin of Error ≈ 0.082

Confidence Interval ≈ (0.798, 0.962)

Therefore, the confidence interval for the given numbers, with a sample proportion of 0.88 and a confidence level of 0.94, is approximately (0.798, 0.962) when rounded to two decimal places.

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Answer: 9x^2-48x+64

I was wrong originally

I am so sorry

Step-by-step explanation:

(3x-8)(3x-8)

9x^2-24x-24x+64

9x^2-48x+64

Answer:

0.95

Step-by-step explanation:

Answer:

= 1 7/12

Step-by-step explanation:

6 1/2 - 4 11/12 =

6 6/12 - 4 11/12 =

5 18/12 - 4 11/12 =

=1 7/12

To check if the answer is right or wrong, you can add 1 7/12 to 4 11/12

4 11/12 + 1 7/12 = 5 18/12 = 6 6/12 = 6 1/2

Hope this helps and pls do mark me brainliest if you can:)

9514 1404 393

Answer:

  $579,400

Step-by-step explanation:

The total will be ...

  $575,900 +3.5×10³ = $575,900 +3,500 = $579,400

At the end of the day, the vault held $579,400.

Answer:

Step-by-step explanation:

\([(6^{2}+8^{2})^{\frac{1}{2}}]^{3} = [(36+64)^{\frac{1}{2}}]^{3}\\\\= [(100)^{\frac{1}{2}}]^{3}\\\\= 10^{3}\\\\= 1000\)

The critical points of the function are (0, 0) and (3/4, -9/4), To classify the critical points, we need to examine the second partial derivatives of f(x, y) at each point

To find the critical points of the function f(x, y) = 8x^3 + y^2 + 6xy, we need to find the values of (x, y) where the partial derivatives with respect to x and y are equal to zero.

Taking the partial derivative with respect to x, we have:

∂f/∂x = 24x^2 + 6y = 0.

Taking the partial derivative with respect to y, we have:

∂f/∂y = 2y + 6x = 0.

Solving these two equations simultaneously, we get:

24x^2 + 6y = 0,

2y + 6x = 0.

From the second equation, we can solve for y in terms of x:

Y = -3x.

Substituting this into the first equation:

24x^2 + 6(-3x) = 0,

24x^2 – 18x = 0,

6x(4x – 3) = 0.

Therefore, we have two possibilities for x:

1. x = 0,

2. 4x – 3 = 0, which gives x = ¾.

Substituting these values back into y = -3x, we get the corresponding y-values:

1. x = 0 ⇒ y = 0,

2. x = ¾ ⇒ y = -9/4.

Hence, the critical points of the function are (0, 0) and (3/4, -9/4).

To classify the critical points, we need to examine the second partial derivatives of f(x, y) at each point. However, since the original function does not provide any information about the second partial derivatives, further analysis is required to classify the critical points.

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Answer:between 30 and 40

Step-by-step explanation:

Answer:

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Step-by-step explanation:

xvgdedfgfffrtttttgggg

Answer:

d=117.33 m

Step-by-step explanation:

Initial velocity of planes, u = 0 (because they are at rest)

Acceleration, a = 3.3 m/s²

Final take off speed, v = 88 m/s

We need to find the minimum allowed length for the runway. Let it is d. d will be the distance. It can be calculated using third equation of motion as follows :

\(v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\)

Putting all the values, we get :

\(d=\dfrac{88^2-0^2}{2\times 33}\\\\d=117.34\ m\)

Hence, the minimum allowed length for the runway is 117.33 m.

The factor by which the volume of cube increased is 0.0030

What is a cube ?

A cube is a three-dimensional solid object in geometry that is surrounded by six square faces, facets, or sides, three of which meet at each vertex. One of the five Platonic solids, the cube is the only regular hexahedron. It contains 8 vertices, 6 faces, and 12 edges.

The fundamental distinction between a cube and a square is that the former has three dimensions—length, breadth, and height—while the latter only has two. A cube is composed of squares, which are a type of 2-dimensional (2D) shape (such as a circle, square, triangle, etc.).

let l be the side of a cube

the new length of cube is l' = 1.001l

Initial volume (v1) = l³

final volume (v2) = (1.001)³l³

The factor by which the volume increased is  = v1 / v2

                                                                           = ((1.001)³l³ - l³)/l³

                                                                           = 0.003003

                                                                           = 3 x 0.001

                                                                           ≅ 0.0030

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Answer:

kilometers, C

Step-by-step explanation:

office ➡️ recording studio = 1km

recording studio ➡️ home = twice the distance = 2km

distance Ronny can walk, d

= 2km + 1km

= 3km

2.18 is the right z-value to utilize for a level of confidence of 98.54%.

Assuming a two-sided confidence interval,

(100-98.54)/2 = 1.46

Lower percentile = 1.46%

In terms of the information that is provided, we have that the percentile is the 3-th percentile.

We need to find the z-score associated to this percentile. How do you we do so? We need to find the

value z* that solves the equation below.

P(Z < z*) = 0.0146

The value of z" that solves the equation above cannot be made directly, it solved either by looking at

a standard normal distribution table or by approximation (the way Excel or this calculator does)

Then, it is found that that the solution is z* = -2.18

Therefore, it is concluded that the corresponding z-score associated to the given 2nd percentile is

Z =-2.18

The results found above are depicted graphically as follows:

The Z-score z = -2.18 is associated to the 2nd percentile

Hence, lower interval Z-score =-2.18

Since the standard normal distribution is symmetric around 0,

Therefore, upper interval Z-score = 2.18

Appropriate z-value =2.18

Hence, the appropriate z-value to use for a 98.54% level of confidence is 2.18

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Answer:

5i

Step-by-step explanation:

Answer:

5i

Step-by-step explanation:

sqrt( -25)

Rewriting

sqrt( 25 * -1)

We know that sqrt(ab) = sqrt(a) sqrt(b)

sqrt(25) sqrt(-1)

We know that sqrt(-1) = i

±5 i

Answer:

Explanation:

Quotient rule in differentiation

The point that lies on the circle is represented by the equation (x−3)² + (y+4)² = 6² is (-3,-4).

A circle can be characterized by its center's location and its radius's length.

Let the center of the considered circle be at (h, k) coordinate. Let the radius of the circle be 'r' units.

Then, the equation of that circle would be:

(x-h)² + (y-k)² = r²

The sole point that lies on the circle when a circle is graphed with the equation on the graph and all the specified points are graphed is (-3,-4).

Consequently, the equation (x-3)² + (y+4)² = 6² represents the point on the circle (-3,-4).

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Answer:

Each egg costs $0.60

Each piece of toast costs $0.30

Step-by-step explanation:

Let's assume that the cost of a single egg is E

And the price of a toast as T

Kendra charges $1.50 for one toast and two eggs

The equation above will be

2E + T = $1.50

And the other equation is

E + T = $0.90

For the second equation, we make E the subject of the formula

E = 0.90 - T

Now substitute for this in equation 1

2E + T = 1.50

It will now be 2(0.90 - T) + T = 1.50

1.80 - 2T + T = 1.50

T= $0.30

price of one toast is $0.30

And now, for the price of an egg, we substitute T = 0.30 in the equation

E= $0.60

Answer:

sales tax is $0.6

total cost is $20.60

Step-by-step explanation:

20*0.03=0.6

20*1.03=20.6

Therefore, the correct statistical decision is (b) reject the null hypothesis with either α = .05 or α = .01.

To determine the correct statistical decision, we need to compare the calculated F-ratio to the critical F-value based on the degrees of freedom and the chosen alpha level (α).

The degrees of freedom for the numerator (df between) is k - 1, where k is the number of conditions (k = 4 in this case). The degrees of freedom for the denominator (df within) is N - k, where N is the total sample size (N = 8 * 4 = 32).

Using a significance level of α = .05, we can consult an F-table or use statistical software to find the critical F-value with (k-1) and (N-k) degrees of freedom. For this case, the critical F-value is 3.10.

Since the calculated F-ratio (F = 4.60) is greater than the critical F-value (3.10) at α = .05, we can reject the null hypothesis and conclude that there are statistically significant mean differences among the four conditions.

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