please help me with question b) and please explain!!
look at the attached image

Taking into account the reaction stoichiometry, 1.67 moles of NH₃ are formed from 2.5 moles of hydrogen.

In first place, the balanced reaction is:

N₂ + 3 H₂ → 2 NH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: 3 moles of H₂ produce 2 moles of NH₃, 2.5 moles of H₂ produce how many moles of NH₃?

moles of NH₃= (2.5 moles of H₂×2 moles of NH₃)÷3 moles of H₂

moles of NH₃=1.67 moles

Finally, 1.67 moles of NH₃ are formed.

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Answer:

35

Step-by-step explanation:

5 x 7 = 35

Answer:

35

Step-by-step explanation:

The equation is 5x. When the value of x is 7, you multiply 5*x or 5*7. This gives you 35.

Answer:

complementary x=5

Step-by-step explanation:

It takes 1 hour 43 minutes to finish mowing the lawn.

The rate of work done by Gregory and Jennifer finish mowing the lawn in

1 hour 43 minutes.

According to the question

Gregory can mow the family's lawn in 3 hours, she mows at a rate of 1/3 of the lawn per hour(1/3 lawn/hour)

Jennifer can mow it in 4 hours, which means her rate is 1/4 lawn/hour.

Together , their rates are 1/3 + 1/4.

This equals 7/12 lawns/hr.

We want to know how many hours they have to mow in order to mow 1 lawn.

This can be represented by the equation : \(\frac{7}{12} \times x = 1\)

To solve for x, we would divide both sides by 7/12.

This leaves us with x = 12/7 which is 1.714.

Convert 1.714 to minutes by multiplying 60.

This gives you a final answer of about 1 hour 43 minutes.

Hence, It takes 1 hour 43 minutes to finish mowing the lawn.

The rate of work done by Gregory and Jennifer finish mowing the lawn in

1 hour 43 minutes.

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Answer:

1500 grams

Step-by-step explanation:

A= P(0.5)^t

A=3000(0.5)^1

A=1500

Answer:

Step-by-step explanation:

Answer:

i really need help on this one too

Step-by-step explanation:

.

Whyte Clinic records an amount of $ 434100 as the cost for the land.

To purchase a land Whyte Clinic did costs:

Cost of Land is given by = $ 420000

Amount of property taxes due on the land is given by = $ 4500

The total fees for title and attorney is given by = $ 3000

The cost to grade the land is given by = $ 6600

So the total cost for the land recorded by the Whyte Clinic is given by

= $ (420000 + 4500 + 3000 + 6600)

= $ 434100

Hence Whyte Clinic records an amount of $ 434100 as the cost for the land.

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Answer:

44

Step-by-step explanation:

i done this

By using zeroes theorem,

(a) False. The statement "p(x) = x^3 + x has three real zeros" is false because the polynomial has only one real zero and two complex zeros. The real zero is at x = 0, and the complex zeros are given by the solutions of x^2 + 1 = 0, which are x = i and x = -i.

(b) False. The statement "polynomials can only have complex zeros" is false because polynomials can have both real and complex zeros. The polynomial p(x) = x^3 + x has one real zero and two complex zeros.

(c) False. The statement "p(x) cannot be factored into linear factors with real coefficients because (x^2 + 1) has no zeros" is false because the polynomial p(x) can be factored into linear factors with complex coefficients. Specifically, p(x) = x(x + i)(x - i), where the factors x, x + i, and x - i are linear and have complex coefficients.

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Answer:

\(\dfrac{1}{2}\) day

Step-by-step explanation:

Given that:

Owen who is an alien has only 4/5 of his socks clean.

and he wears 2/5 socks a day.

Out of his total 4/5 clean socks.

It will take him (4/5 ÷ 2/5) days to wash all his socks

i.e

the numbers of days since he washed all his socked is:

= \(\dfrac{4}{5} \div \dfrac{2}{5}\)

= \(\dfrac{4}{5} \times \dfrac{5}{2}\)

= \(\dfrac{1}{2}\)

Answer:

4

Step-by-step explanation:

Candle is lit every 10 minutes :

Number of candles lit in 55 minutes:

Starting from 0 minute ; Numbe rod candles lit on 55 minutes = 6

1st candle burns out after 40 minutes

Second burns out after 50 minutes

Third will burn out after 60 minutes

Hence Number of candles still burning :

Number of candles lit - Number of candle burnt out

6 - 2 = 4 candles

Surface area of a square pyramid:

To find the surface area of the given pyramid as you don't have the length of the slant height, use the height of the pyramid and the radius of the base to form a right triangle and find the slant height:

Pythagorean theorem for the right triangle above:

Perimeter of the base is:

Area of the square base:

Then, the surface area of the given pyramid is

Answer:

2

6

9

Step-by-step explanation:

Because if you pay attention to our teacher he told us how to respond it!

Answer: 13/25

Step-by-step explanation: it is equal to 52% which is greater than 50%

50% is greater than 13/25. To compare these two values, you can convert both of them to a common denominator, such as 50%. 50% is equal to 1/2, so 13/25 is equal to 52/50, which is less than 1/2 or 50%. Alternatively, you can also express both fractions as decimals and compare the two values that way. 50% is equal to 0.5, and 13/25 is equal to 0.52, so 50% is still greater than 13/25.

Answer:

,

Step-by-step explanation:

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Answer:

they make $19 dollars in profit per sweater

Step-by-step explanation

154/11 is 14. This means that they paid $14 dollars per sweater.

363/11 is 33, meaning that they sold each sweater for $33.

$33 - $14 is $19, thus they made $19 dollars per sweater.

(I could be wrong, though. I tend to make dumb and simple mistakes of simple math, lol)

Answer:

19

Step-by-step explanation:

First Find the difference of the two amounts.

Profit = Sale - Cost

Profit = 363 - 154

Gross Profit = 209

Each sweater sold brings in a profit of 209 / 11  = 19 dollars

The trajectory of the particle is obtained by eliminating the variable t between the equations x(t) = cos(t) and y(t) = 4sin²(t). Plotting various (x, y) positions for different values of t helps visualize the trajectory in the x-y plane.

To sketch the trajectory, we need to eliminate t between the equations x(t) = cos(t) and y(t) = 4sin²(t) to obtain y as a function of x. Let's begin by expressing sin²(t) in terms of cos(t):

sin²(t) = (1 - cos²(t))

Substituting this back into the equation for y(t):

y(t) = 4(1 - cos²(t))

Now, we can substitute x(t) = cos(t) into the equation for y(t):

y(x) = 4(1 - x²)

This expression gives us y as a function of x, allowing us to sketch the trajectory in the x-y plane. By choosing different values of t, we can calculate the corresponding x and y positions and plot them. As t varies, the particle will move along the trajectory described by the graph of y(x) = 4(1 - x²). The resulting sketch will provide a visual representation of the particle's path in the x-y plane.

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Answer:

42

Step-by-step explanation:

Answer:

Step-by-step explanation:

Find the distance to walk along the arc NQ

Find the area inside one of the 4 sectors

⇒ Circle area = π * r² = π * 36 [cm²] ≈ 113.1 [cm²]

π ≈ 3.14159265 ≈ 3.14

d = r * 2 = 6 [cm] * 2 = 12 [cm]

Find the distance to walk along the following path: Start at point P and go to R then to Q and over to N then back to P:

Answer:

1 & 2

Step-by-step explanation:

1. Diagonals bisect each other

2. Diagonals are congruent

Step-by-step explanation:

The points that lies on the same line are (-3, 12), and, (-1, 4).

Here, we have,

The given coordinate points are (-2, 8) and (5,-20).

Here, slope (m)= 8+20/-2-5

= 28/-7

=-4

Substitute m= -4 and (x, y)=(-2,8) in y=mx+c, we get

8 = 8+c

or, c = 0

So, the equation of a line is y= -4 x

Now,

(-6, -2) in the given equation is -2=-4 (-6)

-2≠ 24

(-3, 12)  in the given equation is y= -4 x

12 = 12

(4, 16) in the given equation is y= -4 x

16 ≠ -16

(0, 6) in the given equation is y= -4 x

6 ≠ 0

(-1, 4) in the given equation is y= -4 x

4 = 4

(7,5) in the given equation is y= -4 x

5 ≠ -28

Therefore, the points that lies on the same line are (-3, 12), and, (-1, 4).

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The budgets of Hong Kong, the United States of America, and Korea differ in contents, formats, advantages, and disadvantages. While each budget has its strengths and weaknesses, they all aim to provide a clear and transparent financial plan for their respective countries.

A budget is a financial plan that estimates expected income and expenditure for a specific period. It may include income, expenses, debts, and savings. Budgets may vary from country to country and can be analyzed by comparing their contents, formats, advantages, and disadvantages. Here are the budgets of Hong Kong, the United States of America, and Korea:

United States Budget:

Korean Budget:

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Answer:

sm like this hope this helps your welcome

Answer:

The discounted price of the ticket was $75 x .80 = $60

The service fee was $60 x .10 = $6

The total price Jeanette paid for the ticket was $60 + $6 = $66

So the answer is 66

Step-by-step explanation:

Answer:

The contact force between the block and the stick immediately before the system is released, we can use the equations of motion for the stick and the block.

Step-by-step explanation:

(a) To prove that the stick will hit the table before the block if cos θ0 ≥√2/3, we need to consider the motion of the stick and the block separately.

Let's start with the motion of the stick. The stick is pivoted at one end and released from rest at an angle θ0 with the table. The gravitational force acting on the stick can be resolved into two components: one parallel to the table and one perpendicular to the table. The component parallel to the table will cause the stick to rotate and the component perpendicular to the table will cause the stick to move downwards. The motion of the stick can be described using the following equations:

Iα = MgLsinθ - F

Ma = MgLcosθ - N

where I is the moment of inertia of the stick about its pivot point, α is the angular acceleration of the stick, M is the mass of the stick, g is the acceleration due to gravity, F is the force of friction between the stick and the table, a is the linear acceleration of the stick, and N is the normal force between the stick and the table.

Now, let's consider the motion of the block. The block is placed at the other end of the stick and remains at rest. The gravitational force acting on the block can be resolved into two components: one parallel to the table and one perpendicular to the table. The component parallel to the table will cause the block to move with the stick and the component perpendicular to the table will cause the block to move downwards. The motion of the block can be described using the following equation:

ma = MgLcosθ - N

where m is the mass of the block.

If the stick hits the table before the block, then the angle θ at which this happens satisfies the condition a = 0. In other words, the linear acceleration of the stick is zero at the instant the stick hits the table. Substituting a = 0 into the equation for the linear acceleration of the stick, we get:

MgLcosθ - N = 0

Substituting N = Mgcosθ into the equation for the linear acceleration of the block, we get:

ma = MgLcosθ - Mgcosθ

Simplifying this expression, we get:

ma = Mg(cosθ)(L - 1)

Since the block is at rest, its acceleration is zero. Therefore, cosθ = 0 or L = 1. Since L is the length of the stick, it cannot be less than 1. Therefore, we must have cosθ = 0, which means that θ = π/2.

Now, let's consider the condition cos θ0 ≥√2/3. We can rewrite this condition as θ0 ≤ cos-1(√2/3). If θ0 is less than or equal to π/4, then cos θ0 is greater than or equal to √2/2, which is greater than √2/3. Therefore, we can assume that θ0 is greater than π/4.

Using the equations for the motion of the stick and the block, we can show that if θ0 ≤ cos-1(√2/3), then the block will hit the table before the stick. This can be done by solving the equations of motion for the stick and the block numerically or by using energy conservation arguments. However, this is beyond the scope of this answer.

(b) To find the contact force between the block and the stick immediately before the system is released, we can use the equations of motion for the stick and the block. At the instant the system is released, the stick and the block are at rest and

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The probability that the sample mean is 36 or more pieces of candy is approximately 18.67%.

To calculate the probability that the sample mean is 36 or more pieces of candy, we need to use the properties of the normal distribution. Given that the population mean is 35 pieces of candy and the standard deviation is 5 pieces, we can use the Central Limit Theorem.
The Central Limit Theorem states that as the sample size increases, the distribution of the sample means approaches a normal distribution, regardless of the shape of the population distribution. Since the sample size is 40, we can assume a normal distribution.
To calculate the probability, we need to standardize the sample mean using the formula z = (x - μ) / (σ / √n),

where x is the sample mean, μ is the population mean, σ is the standard deviation, and n is the sample size.
In this case, x = 36, μ = 35,

σ = 5, and n = 40.

Plugging these values into the formula, we get z = (36 - 35) / (5 / √40)

≈ 0.8944.
To find the probability that the sample mean is 36 or more, we need to calculate the area under the normal curve to the right of z = 0.8944. Using a standard normal table or a calculator, we find that the probability is approximately 0.1867, or 18.67%.
Therefore, the probability that the sample mean is 36 or more pieces of candy is approximately 18.67%.

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Answer:

g(f(2)) = \(\frac{1}{2}\)

Step-by-step explanation:

evaluate f(2) , then substitute the value obtained into g(x)

f(2) = 3(2) - 2 = 6 - 2 = 4 , then

g(4) = \(\frac{3}{4+2}\) = \(\frac{3}{6}\) = \(\frac{1}{2}\)