A boy is pushing a 50 kg box with the force F but the box is not moving. (10 min)30° F=20a) what type of friction is acting on this box. Why? b) What is the direction of friction force? Why? c) draw the Free body diagram d) calculate the amount of friction force. e) Calculate the coefficient of friction between box and floor.

Answer:

The midpoint would be (-3, 1)

Step-by-step explanation:

since the formula for midpoint is \((\frac{x^{1} +x^{2} }{2}, \frac{y^{1} +y^{2} }{2} )\), you would just have to plug in the coordinates given on the graph. I think your points are (-1, 4) and (-5, -2).

\((\frac{-1 -5}{2}, \frac{4-2}{2} )\)

\((\frac{-6}{2}, \frac{2}{2} )\)

If you simplify, then you should get (-3, 1)!

Answer:

1.4 people out of 10

Step-by-step explanation:

Just divide it by 10

Answer:

only 4 people

Answer:

There are 3 numbers that are not whole numbers.

3/4, 3.7, and sqrt 3 are not whole numbers

Answer:

3

Step-by-step explanation:

There are only 3 that aren't whole numbers. The whole numbers are: 32, 1,265, 3000, and 1. The numbers that aren't whole are: 3/4, 3.7, and √3

The sides of the given right triangle are:

g = 33.80

h = 31.20

j = 13

What is a triangle?

A triangle is a polygon with three vertices and three sides. The angles of the triangle are formed by the connection of the three sides end to end at a point. The triangle's three angles add up to 180 degrees in total. Any three points in Euclidean geometry, when they are not collinear, produce a distinct triangle. A right triangle is a triangle with two perpendicular sides and one angle that is a right angle.

The given figure has a large right triangle with sides g,h and j and a small right triangle with sides 12, j and 5.

Using the small triangle, we can find the value of j.

By Pythagoras theorem,

j² = 12² + 5² = 144 + 25 = 169

j = 13

Now using trigonometric relation we can find the angle ∅  between j and 5.

sin ∅ = 12/13 = 0.923

∅ =  sin ⁻¹ (0.923) = 67.37°

This angle is common for both triangles.

So for large triangle,

tan 67.37 = h/j = h/13

2.4 = h/13

h = 31.2

By Pythagoras theorem,

g² = h² + j²  = 31.2²  + 13² = 1142.44

g = 33.8

Therefore the sides of the given right triangle are:

g = 33.80

h = 31.20

j = 13.

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Answer:

Option 4

Step-by-step explanation:

Area of a circle (A) = πr²-------------(i)

Circumference (C) = 2πr

=>C = 2πr

=> 2πr= C

=> π = C/2r

Substituting the value of π = C/2r in the first equation i.e (i)

A = (C×r²)/2r

= (C . r)/2

= 1/2 × C × r

Therefore, option 4 is the correct option

The new coordinates are M'(-1, -7), N'(-8, -5), O'(-4, -2), and P'(3, -4)

A 180 degrees rotation denoted by R(180, 0) is a rotation that has the same effect as the 180 degrees counterclockwise of a figure.

And it has the algebraic rule of its rotation to be changed from (x, y) to (-x, -y) i.e  (x, y) ⇒ (-x, -y)

The coordinates of the parallelogram are given as

M(1, 7), N(8, 5), O(4, 2), and P(-3, 4)

The rotation is given as 180° rotation

As mentioned above,

We have (x, y) ⇒ (-x, -y)

Substitute M(1, 7), N(8, 5), O(4, 2), and P(-3, 4) in (x, y) ⇒ (-x, -y)

So, we have

M'(-1, -7), N'(-8, -5), O'(-4, -2), and P'(3, -4)

Hence, the coordinates of the image are M'(-1, -7), N'(-8, -5), O'(-4, -2), and P'(3, -4)

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we make the table using 3 any numbers for x and replacing on the function

x=-1

x=0

x=1

Table

place the points and joint it

the function is growth since it can be seen in the graph

Domain

We can see on graph the line can be any value of x because horizontally it has no beginning or end

Range

We can see the smallest value that the graph could take is -4 and the May is not defined so it is infinite

Y intercept

point where x = 0 and the line touches the y axis

the point is

Asymptote

horizontal or vertical line that the nape line will touch

our asymptote lies on the value of y = -4, why the line never touches this value

Answer:

Below

Step-by-step explanation:

Remember in a RIGHT triangle ,  cos = adj leg /  hypotenuse

for this one then

cos (37) = 11/x       re-arrange to

x = 11/cos 37

x = 11/ .7986 = 13.8 units

Answer:

  13.77

Step-by-step explanation:

You want the hypotenuse of a right triangle with acute angle 37° and adjacent side 11.

The relevant trig relation is ...

  Cos = Adjacent/Hypotenuse

  cos(37°) = 11/x

Solving for x, we find ...

  x = 11/cos(37°) ≈ 13.77

The measure of side x is 13.77 units.

The maximum burn rate ∣ΔM/Δt∣ that the engine could reach before the ship's acceleration exceeded 5 g and its human occupants began to lose consciousness is approximately 51.0 kg/s.

Acceleration is directly proportional to the force acting on an object. In simple terms, if the force on an object is greater, then it will undergo more acceleration. However, there are limitations to the acceleration that can be tolerated by the human body. At about 5 g (49.0 m/s2) for more than a few seconds, an average person starts to lose consciousness. Let's use this information to answer the given question.

Let the maximum burn rate |ΔM/Δt| that the engine could reach before the ship's acceleration exceeded 5 g be x.

Let the mass of the spaceship be m and the exhaust speed of the engine be v.

Using the formula for the thrust of a rocket,

T = (mv)e

After substituting the given values into the formula for thrust, we get:

T = (3.00 × 104)(2.50 × 103) = 7.50 × 107 N

Therefore, the acceleration produced by the engine, a is given by the formula below:

F = ma

Therefore,

a = F/m= 7.50 × 107/3.00 × 104= 2.50 × 103 m/s²

The maximum burn rate that the engine could reach before the ship's acceleration exceeded 5 g is equal to the acceleration that would be produced by a maximum burn rate. Therefore,

x = a/5g= 2.50 × 103/(5 × 9.8)≈ 51.0 kg/s

Therefore, the maximum burn rate ∣ΔM/Δt∣ that the engine could reach before the ship's acceleration exceeded 5 g and its human occupants began to lose consciousness is approximately 51.0 kg/s.

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The slope of a line is determined by the formula:

(y2 - y1) / (x2 - x1)

So for the points (9, 5) and (21, -5), the slope would be:

(-5 - 5) / (21 - 9) = -10 / 12 = -5/6

So the slope of the line that passes through the points (9, 5) and (21, -5) is -5/6 in simplest form.

Answer:

Correct answer is C. she solved the question using long division correctly

Answer:

C. Yes, she worked the problem correctly.

Answer:

(a)1/10

(b)1/5

(c)4/5

hope it helps

Answer:

answer for A) 1/10

answer for B) 1/10

answer for C) 8/10 given that you consider the digit '1' present in 10. if not, 9/10 is the answer

According to Zaller's Receive-Accept-Sample (RAS) model, individuals who are most susceptible to the message of a political action committee launching a new advertisement aimed at expanding health insurance to low-income Americans through increased government funding would be those who both receive and accept the message.

The RAS model suggests that individuals have varying levels of political knowledge and are exposed to different sources of information. Those who are more likely to receive the message are individuals who are politically interested and engaged, while those who are more likely to accept the message are individuals who have limited political knowledge and are less critical of the information presented to them.

Therefore, in the context of the advertisement aiming to expand health insurance to low-income Americans, the most susceptible individuals would be those who are politically interested but have limited political knowledge. These individuals may be more likely to accept the message without critically evaluating its content.

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Answer:

387.872

Step-by-step explanation:

to find volume you have to multiply the length times width times height so that's what I did to get the answer.

Answer:

A = 25.758 m²

Step-by-step explanation:

Width of the sand pit, b = 2.7 m

Length of the sand pit, l = 9.54 m

We want to cover the sand pit with a piece of plastic. We need to find how many square meters of plastic will be needed to cover the sand pit. It is equal to the area of sand pit. It is in the shape of rectangle. Its area is given by :

A = l × b

A = 2.7 × 9.54

A = 25.758 m²

So, 25.758 m² of plastic will be needed to cover the sand pit.

we are given that a person runs 4/5 of a mile per day, that is:

To determine the number of miles he runs in 8 days, we need to multiply the number of miles per day by 8, that is:

Solving we get:

in decimal notation this is:

a) The sampling proportion's mean value is 0.25. 0.016 is the standard deviation. The form resembles a bell.

b) There is a 10% possibility of getting this number, p=0.27 or more, given a sample proportion, so I wouldn't be surprised.

c) Since there is no chance that the sample fraction of 0.31 will occur, I would be shocked if it did.

Given,

a) The null hypothesis proportion would be the middle of the sampling distribution (p-0.25). So, p=0.25 is the sampling proportion's mean value.

This would be the standard deviation:

σp = √(p (1 - p) / n) = √(0.25 × 0.75/731) = 0.016

The distribution would resemble a binomial distribution, hence the form would be bell-shaped.

b) By calculating the z-value and checking for its probability in the standard normal distribution, we may determine the likelihood of a value p=0.27 in this distribution.

z = (p - π) / σp = (0.27 - 0.25) / 0.016 = 0.02/0.016  = 1.25

p(z > 1.25) = 0.106

There is a 10% probability of achieving this value, p=0.27 or more, for a sample proportion, so I wouldn't be surprised.

c) We repeat the calculation for p=0.31

z = (p - π) / σp = (0.31 - 0.25) / 0.016 = 0.06/0.016  = 5

p(z > 5) = 0.000

I would be astonished to see that value because the probability of this sample fraction occurring at p=0.31 is zero.

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Answer:

lmk what you mean and i will help you asap

Answer:

I am soso sorry give me like a day and i will have you an answer

Step-by-step explanation:

i don't uderstand

Answer:

13.3 km/h

Step-by-step explanation:

getting the neutral is adding both the hours and distance, after adding them you can then dicixe the distance by the time getting your average speed (the upstream is what balances the downstream)

a. Integration using parts of ∫(x/√(x+7)) is 2x√(x+7) - 4/3 \((x+7)^{(3/2)}\) + C.

b. Integration using substitution of ∫(x/√(x+7)) is (2/3) \((x+7)^{(3/2)}\) - 7√(x+7) + C.

a) Evaluate ∫(x/√(x+7)) dx using integration by parts:

Let u = x, dv = 1/√(x+7) dx, then du/dx = 1 and v = 2√(x+7)

Using integration by parts formula, we have:

∫(x/√(x+7)) dx = uv - ∫v du/dx dx

= 2x√(x+7) - 2∫√(x+7) dx

Let t = x + 7, then dt/dx = 1 and dx = dt, so the integral becomes:

∫(x/√(x+7)) dx = 2x√(x+7) - 4/3 \((x+7)^{(3/2)}\) + C

where C is the constant of integration.

b) Evaluate ∫(x/√(x+7)) dx using substitution:

Let u = √(x+7), then du/dx = 1/(2√(x+7)) and dx = 2u du

Substituting, we get:

∫(x/√(x+7)) dx = ∫(\(u^2\) - 7) du

= 1/3 \((x+7)^{(3/2)}\) - 7√(x+7) + C

where C is the constant of integration.

c) To verify that the answers in parts (a) and (b) are consistent, we can substitute the expression obtained in part (b) back into the integral in part (a) and simplify:

∫(x/√(x+7)) dx = 2x√(x+7) - 2∫√(x+7) dx

= 2x√(x+7) - 4/3 \((x+7)^{(3/2)}\) + C

Now, substituting the expression obtained in part (b):

= 2x(√(x+7)) - 4/3 \((x+7)^{(3/2)}\) + C

= (2/3) \((x+7)^{(3/2)}\) - 7√(x+7) + C

Thus, the expressions obtained in part (a) and part (b) are consistent and differ only by a constant term.

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option C. Rejecting a true null hypothesis. The level of significance in hypothesis testing is the probability of rejecting a true null hypothesis.

In hypothesis testing, the null hypothesis is a statement that there is no significant difference between two populations or variables, while the alternative hypothesis is a statement that there is a significant difference. The level of significance, denoted by alpha (α), is the probability of rejecting the null hypothesis when it is actually true.

In other words, if the level of significance is set at 0.05 (or 5%), this means that there is a 5% chance of rejecting the null hypothesis when it is actually true. This is known as a type I error, or a false positive.

The level of significance is usually set by the researcher or statistician before conducting the hypothesis test, and is typically based on the desired balance between the risk of making a type I error and the risk of making a type II error (failing to reject a false null hypothesis).

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The level of significance in hypothesis testing is the probability of

a. accepting a true null hypothesis

b. accepting a false null hypothesis

c. rejecting a true null hypothesis

d. could be any of the above, depending on the situation

Answer:

Step-by-step explanation:

Answer:

 2/7

Step-by-step explanation:

The quotient is ...

  \(\dfrac{-16}{-56}=\dfrac{2\cdot8}{7\cdot8}=\boxed{\dfrac{2}{7}}\)

A common factor of -8 can be cancelled from numerator and denominator.

Answer:

0.2857142857

Step-by-step explanation:

Hope this helps!

Brainliest pls

Have a great day!

The surface area of the given prism is 3744 square cm.

The space occupied by any two-dimensional figure in a plane is called the area. The area of the outer surface of any body is called the surface area.

Here the prism contains six surfaces out of these two are trapezoidal and the other is rectangular so the total surface area will be the sum of the area of the trapezoid and the rectangles.

The surface area will be calculated as,

SA = 2 [(24/2)(29+12) + ( 12 x 30 ) + ( 26 x 30 ) + ( 25 x 30 ) + ( 29 x 30)

SA = 984 + 360 + 780 + 750 + 870

SA = 3744 square cm

Therefore, the total surface area will be 3744 square cm.

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ST. The statement is sometimes true. The dimension of the orthogonal complement of the null space of A is equal to the rank of A.

Since A is a 8 x 9 matrix of maximum rank, its rank is 8. Therefore, the dimension of the orthogonal complement of the null space of A is 1, if and only if the null space of A has dimension 7. This means that there are 7 linearly independent vectors that satisfy Ax = 0. It is possible for this to happen, but it is not always true. For example, if A is the identity matrix, then the null space of A is the zero vector, and the dimension of the orthogonal complement of the null space of A is 9, not 1. Therefore, the statement is not always true, but it is sometimes true, depending on the specific matrix A.

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Answer:

X = 1/3 (to make it short) plz brainliest

Step-by-step explanation:

The thing that Eve should do to complete the diagram regarding the trigonometry is B. Shade 30% of one of the brown squares.

Trigonometry simply means the branch of mathematics that's concerned with angles and calculations.

In this case, the thing that Eve should do to complete the diagram regarding the trigonometry is to shade 30% of one of the brown squares. This will represent chemistry.

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Answer:

Shade 3 of the 10 rows in the brown section

Step-by-step explanation:

To evaluate the limits, we substitute the given values into the function.
limx→0+ f(x) Substituting x = 0 into f(x), we get:
f(0) = 2(0)^3 - 10(0)^2 + 6(0)^3 - 0 + 5
f(0) = 0 - 0 + 0 - 0 + 5
f(0) = 5


limx→5+ f(x)
Substituting x = 5 into f(x), we get:
f(5) = 2(5)^3 - 10(5)^2 + 6(5)^3 - 5 + 5
f(5) = 2(125) - 10(25) + 6(125) - 0
f(5) = 250 - 250 + 750
f(5) = 750
limx→5- f(x)
Substituting x = 5 into f(x), we get:
f(5) = 2(5)^3 - 10(5)^2 + 6(5)^3 - 5 + 5
f(5) = 2(125) - 10(25) + 6(125) - 0
f(5) = 250 - 250 + 750
f(5) = 750


As x approaches infinity, the leading term with the highest power dominates. Thus, we only consider the term 2x^3. The limit as x approaches infinity of 2x^3 is infinity. As x approaches negative infinity, the leading term with the highest power dominates. Thus, we only consider the term 2x^3. The limit as x approaches negative infinity of 2x^3 is negative infinity. we need to set the denominator of the function equal to zero and solve for x. In this case, there are no vertical asymptotes because the denominator of the function does not equal zero for any values of x.

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1a) To evaluate the limit limx→0+ f(x), we substitute 0 into the function f(x). This gives us f(0) = 2(0)^3 - 10(0)^2 + 6(0)^3 - 0 + 5 = 0 + 0 + 0 + 0 + 5 = 5.

1b) To evaluate the limit limx→0- f(x), we substitute 0 into the function f(x). This gives us f(0) = 2(0)^3 - 10(0)^2 + 6(0)^3 - 0 + 5 = 0 + 0 + 0 + 0 + 5 = 5.

1c) To evaluate the limit limx→5+ f(x), we substitute 5 into the function f(x). This gives us f(5) = 2(5)^3 - 10(5)^2 + 6(5)^3 - 5 + 5 = 2(125) - 10(25) + 6(125) = 250 - 250 + 750 = 750.

1d) To evaluate the limit limx→5- f(x), we substitute 5 into the function f(x). This gives us f(5) = 2(5)^3 - 10(5)^2 + 6(5)^3 - 5 + 5 = 2(125) - 10(25) + 6(125) = 250 - 250 + 750 = 750.

1e) To evaluate the limit limx→∞ f(x), we analyze the highest power of x in the function. As x approaches infinity, the highest power of x dominates the function. In this case, the highest power is x^3. So, the limit is positive infinity.

1f) To evaluate the limit limx→-∞ f(x), we analyze the highest power of x in the function. As x approaches negative infinity, the highest power of x dominates the function. In this case, the highest power is x^3. So, the limit is negative infinity.

2) To find the vertical asymptotes, we need to determine the values of x that make the denominator of the function equal to zero. From the function f(x), we see that x = -1 and x = 5 are the values that make the denominator zero. Therefore, the vertical asymptotes are x = -1 and x = 5.

To find the horizontal asymptote, we analyze the highest power of x in the function. In this case, the highest power is x^3. So, the degree of the numerator is higher than the degree of the denominator, which means there is no horizontal asymptote.

3) To sketch the graph of f(x), we can start by plotting points using the x and y values obtained from evaluating the function at different values of x. We can use the information from the limits to determine the behavior of the graph near certain x-values.

- The graph approaches 5 from both sides as x approaches 5. Therefore, we have a "hole" or "removable discontinuity" at x = 5. We can represent this as an open circle on the graph.
- The graph approaches 5 as x approaches negative infinity and positive infinity. This indicates a horizontal line at y = 5. We can draw a horizontal line passing through the point (0, 5) on the graph.
- The graph approaches negative infinity as x approaches negative infinity and positive infinity. This indicates that the graph goes downwards as x increases and decreases. We can draw a curve that goes downwards on both sides of the graph.

Additionally, we can plot more points by substituting different values of x into the function to get a clearer picture of the graph.

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Answer:

1: 1/3

2: 3/19

3: 7/3

Step-by-step explanation:

Answer:

Slope=8

Step-by-step explanation: