Is the answer right? I put no solution

1) The wavelength of A is equal to 6.98 × \(10^{-8}\)meters

2) The wavelength of B is equal to 3.45 × \(10^{-11}\) meters

Since we know that the wavelength = speed of light / frequency

The speed of light is 3.00 × \(10^8\) meters per second.

For light sample A with a frequency of 4.30 × 10^15 Hz can be calculated as;

wavelength of A = (3.00 ×  \(10^8\)  m/s) / (4.30 × 10^15 Hz)

wavelength of A = 6.98 ×  \(10^{-8}\) meters

For light sample B with a frequency of 8.70 × \(10^18\) Hz can be calculated as;

wavelength of B = (3.00 ×  \(10^8\) m/s) / (8.70 ×\(10^18\) Hz)

wavelength of B = 3.45 ×  \(10^{-11}\)  meters

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The value of x is -1/6. the answer is -1/6.

Given, The balconies of an apartment building are parallel. There is a fire escape that runs from balcony to balcony.

If the measure of angle 1 is (10x)° and the measure of angle 2 is (34x + 4)°, we need to find the value of x.

To find the value of x, we will use the fact that opposite angles of a parallelogram are equal.

From the given figure, we can see that the angles 1 and 2 are opposite angles of a parallelogram.

So, angle 1 = angle 2 We have, angle 1 = (10x)°and angle 2 = (34x + 4)°

Therefore,(10x)° = (34x + 4)°10x = 34x + 4 Solving the above equation,10x - 34x = 4-24x = 4x = -4/24x = -1/6

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Answer:

Since Mrs. Harper spent a total of $38.25, the cost of all the snacks she bought is $38.25. We can write this as the total cost of Takis plus the total cost of Sour Patch Kids, or $1.25 * t + $1.50 * s = $38.25, where t is the number of Takis and s is the number of Sour Patch Kids.

Mrs. Harper has 28 students, so if she bought the same number of each snack, she would have bought 28 / 2 = <<28/2=14>>14 of each snack. Plugging in 14 for both t and s in the equation above, we get $1.25 * 14 + $1.50 * 14 = $38.25, which means that the total cost of the snacks was $38.25. Since the total cost of the snacks was $38.25 and Mrs. Harper spent $38.25 on snacks, this means that she bought 14 of each snack.

Therefore, the statements that are true are "She bought the same number of each snack" and "She bought 15 of each snack." The other statements are not necessarily true.

Step-by-step explanation:

Comparing the means of the two samples, we find that the difference between the means is significant. Therefore, we can reject the claim and conclude that male and female high school students have different exam scores.

To perform the two-sample t-test, we first calculate the standard error of the difference between the means using the formula:

SE = sqrt((s1^2 / n1) + (s2^2 / n2))

Where s1 and s2 are the population standard deviations of the male and female students respectively, and n1 and n2 are the sample sizes. Plugging in the values, we have:

SE = sqrt((47^2 / 49) + (4.3^2 / 53))

Next, we calculate the t-statistic using the formula:

t = (x1 - x2) / SE

Where x1 and x2 are the sample means. Plugging in the values, we have:

t = (239 - 21.1) / SE

We can then compare the t-value to the critical t-value at α = 0.01 with degrees of freedom equal to the sum of the sample sizes minus 2. If the t-value exceeds the critical t-value, we reject the null hypothesis.

In this case, the t-value is calculated and compared to the critical t-value using the provided standard normal distribution table. Since the t-value exceeds the critical t-value, we can reject the claim that male and female high school students have equal exam scores.

Therefore, the correct answer is:

B. Male and female high school students have different exam scores.

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The correct option is c) Easier interpretation. One of the main advantages of simple models is their ease of interpretation. Simple models tend to have fewer parameters and less complex mathematical equations, making it easier to understand and interpret how the model is making predictions.

This interpretability can be valuable in various domains, such as medicine, finance, or legal systems, where it is important to have transparent and understandable decision-making processes.

Complex models, on the other hand, often involve intricate relationships and numerous parameters, which can make it challenging to comprehend the underlying reasoning behind their predictions. While complex models can sometimes offer higher accuracy or make more detailed predictions, they often sacrifice interpretability in the process.

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Answer:

x=8

Step-by-step explanation:

open the brackets to be

6x-6=42

then collect like tems

6x=48

x=8

Answer:

Step-by-step explanation:

Answer:

72

Step-by-step explanation:

Multiply all the numbers, and you get the answer

The probability of a banana cue or a camote cue is 7/14

From the question, we have the following parameters that can be used in our computation:

Banana = 5

Camote = 9

Boiled banana = 7

Boiled camote = 3

From the above, we have

Total = 5 + 9 + 7 + 3

Total = 24

Also, we have

Banana cue or a camote cue = 5 + 9

Banana cue or a camote cue = 14

So, we have

P = 14/24

Evaluate

P = 7/12

Hence, the probability is 7/12

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Answer:

C

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

The arrow is pointing to the right which means its greater than, and the circle is open so it doesn't include 4

a. The regular rate of markup on cost is approximately 26%.

b. The rate of markdown on the demonstrator unit is approximately 20%.

c. The operating profit on the demonstrator unit is approximately $3.73.

d. The rate of markup on cost that was actually realized is approximately 0.28%.

a. To calculate the regular rate of markup on cost, we need to find the difference between the selling price and the cost, and then calculate the percentage markup based on the cost.

Let's denote the cost as C.

Selling price = Cost + Markup

$1,690 = C + (26% of C)

To find the cost:

$1,690 = C + 0.26C

$1,690 = 1.26C

C = $1,690 / 1.26

C ≈ $1,341.27

Markup on cost = Selling price - Cost

Markup on cost = $1,690 - $1,341.27

Markup on cost ≈ $348.73

Rate of markup on cost = (Markup on cost / Cost) * 100

Rate of markup on cost = ($348.73 / $1,341.27) * 100

Rate of markup on cost ≈ 26%

The regular rate of markup on cost is approximately 26%.

b. The rate of markdown on the demonstrator unit can be calculated by finding the difference between the original selling price and the clearance price, and then calculating the percentage markdown based on the original selling price.

Original selling price = $1,690

Clearance price = $1,345

Markdown = Original selling price - Clearance price

Markdown = $1,690 - $1,345

Markdown = $345

Rate of markdown on the demonstrator unit = (Markdown / Original selling price) * 100

Rate of markdown on the demonstrator unit = ($345 / $1,690) * 100

Rate of markdown on the demonstrator unit ≈ 20%

The rate of markdown on the demonstrator unit is approximately 20%.

c. Operating profit or loss on the demonstrator unit can be calculated by finding the difference between the clearance price and the cost.

Cost = $1,341.27

Clearance price = $1,345

Operating profit or loss = Clearance price - Cost

Operating profit or loss = $1,345 - $1,341.27

Operating profit or loss ≈ $3.73

The operating profit on the demonstrator unit is approximately $3.73.

d. The rate of markup on cost that was actually realized can be calculated by finding the difference between the actual selling price (clearance price) and the cost, and then calculating the percentage markup based on the cost.

Actual selling price (clearance price) = $1,345

Cost = $1,341.27

Markup on cost that was actually realized = Actual selling price - Cost

Markup on cost that was actually realized = $1,345 - $1,341.27

Markup on cost that was actually realized ≈ $3.73

Rate of markup on cost that was actually realized = (Markup on cost that was actually realized / Cost) * 100

Rate of markup on cost that was actually realized = ($3.73 / $1,341.27) * 100

Rate of markup on cost that was actually realized ≈ 0.2781% ≈ 0.28%

The rate of markup on cost that was actually realized is approximately 0.28%.

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Answer:

(- 1, 7 )

Step-by-step explanation:

Given the 2 equations

3x - 4y = - 31 → (1)

- 3x - 3y = - 18 → (2)

Adding the 2 equations term by term will eliminate x, that is

0 - 7y = - 49

- 7y = - 49 ( divide both sides by - 7 )

y = 7

Substitute y = 7 into either of the 2 equations and solve for x

Substituting into (1)

3x - 4(7) = - 31

3x - 28 = - 31 ( add 28 to both sides )

3x = - 3 ( divide both sides by 3 )

x = - 1

solution is (- 1, 7 )

Answer:

-1and 7 hope it helpssss

Answer:

Step-by-step explanation:

answer is c

Answer:

The answer is B, the second one on your screen. I hope I wasn't too late! :)

Answer:

the roots of f(x) = (x+5)3(x-9)2(x+1) are -5 (with a multiplicity of 3), 9 (with a multiplicity of 2)

Step-by-step explanation:

To find the roots of f(x) = (x+5)3(x-9)2(x+1), we need to set the polynomial equal to zero and solve for x.

f(x) = (x+5)3(x-9)2(x+1)

Setting f(x) equal to zero, we get:

0 = (x+5)3(x-9)2(x+1)

The roots of the polynomial are the values of x that make f(x) equal to zero. Therefore, the roots of the polynomial are:

-5 (with a multiplicity of 3), 9 (with a multiplicity of 2), and -1

Therefore, the roots of f(x) = (x+5)3(x-9)2(x+1) are -5 (with a multiplicity of 3), 9 (with a multiplicity of 2),

Answer:

well its a

Step-by-step explanation:

its a c and d

Answer:

3 & 4

hope this helps :)

Answer:

it will be y=3x +? i forgot how to find b

Step-by-step explanation:

Answer:

y=3x+1

Hope it helps <3

The depth of the water in the fish tank will increase by 8.3 cm when Harry pours the 400ml glass of water into the tank.

First, we need to find the volume of the fish tank. This can be done by multiplying the length, width, and height:

25 cm x 20 cm x 30 cm = 15,000 cm³

Since the fish tank is currently 1/4 full, we know that there is 1/4 of 15,000 cm^3 of water in the tank:

15,000 cm^3 x 1/4 = 3,750 cm³

Next, we need to find out how much the water level will rise when Harry pours in the 400ml glass of water. We know that 1ml of water is equivalent to 1cm³, so:

400 ml = 400 cm³

Now we can add this to the current volume of water in the tank:

3,750 cm³ + 400 cm³ = 4,150 cm³

Finally, we can use the formula for the volume of a rectangular prism (V = lwh) to find the new height of the water level. Since we know the length and width of the tank, and we just calculated the new volume of water, we can rearrange the formula to solve for height (h):

V = lwh

4,150 cm³ = 25 cm x 20 cm x h

h = 4,150 cm³ / (25 cm x 20 cm)

h = 8.3 cm

Therefore, the depth of the water in the fish tank will increase by 8.3 cm when Harry pours the 400ml glass of water into the tank.

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Answer:

x = 1

Step-by-step explanation:

f(x) = g(x) , substitute values

3x - 4 = - 2x + 1 ( add 2x to both sides )

5x - 4 = 1 ( add 4 to both sides )

5x = 5 ( divide both sides by 5 )

x = 1

Answer: If n>1, then any positive number raised to the power of n will always be greater than 1. Therefore, any number greater than 1 raised to the power of n, such as 2^n, 3^n, etc., will also always be greater than 1.

Step-by-step explanation:

The value of y can be determined as,

SOLUTION

By definition, adjacent angles are (of a pair of angles) formed on the same side of a straight line when intersected by another line.

Vertical Angles are the angles opposite each other when two lines cross.

Going by this above definition, a pair of adjacent angles in the figure in Q1 are:

4 and 2.

Going by this above definition, a pair of vertical angles in the figure in Q1 are:

3 and 2.

Answer:

monthly cost with 20 slices:

5 + (1.75 x 20)

5+35

40

monthly cost with x slices:

1.75x + 5

Hope this helps!

The centroid of the region bounded by the curves y = 12x and y = √x is (72,1.88).

To find the centroid of the region bounded by the given curves y = 12x and y = √x, the following steps should be followed.

Step 1: Sketch the region bounded by the two curves to have an idea of what the region looks like.

Step 2: Determine the area of the region bounded by the two curves. The area A can be computed by evaluating the definite integral of the difference between the two functions. \(\[\int\limits_{0}^{144} (\sqrt{x}-12x)dx\]\)  We solve for this integral below.\(\[\int\limits_{0}^{144} (\sqrt{x}-12x)dx = 64 - 1728 + \frac{2}{3}\sqrt{6}\] \[\int\limits_{0}^{144} (\sqrt{x}-12x)dx = -1663.30\]\)

Step 3: To find the centroid of the region, we need to determine the x and y coordinates of the centroid. The x-coordinate of the centroid is given by the formula below.

\(\[x = \frac{1}{A}\int\limits_{a}^{b} \frac{1}{2}(y_1^2-y_2^2)dx\]\)

where A is the area of the region, and y1 and y2 are the upper and lower functions, respectively. Substituting values, we obtain

\(\[x = \frac{1}{-1663.30}\int\limits_{0}^{144} \frac{1}{2}((\sqrt{x})^2-(12x)^2)dx\]  \[x = 72\]\)

 The y-coordinate of the centroid is given by the formula below.

\(\[y = \frac{1}{2A}\int\limits_{a}^{b}(y_1+y_2)\sqrt{(y_1-y_2)^2+4dx}\]\)

 Substituting values, we obtain \(\[y = \frac{1}{2(-1663.30)}\int\limits_{0}^{144}(12x+\sqrt{x})\sqrt{(\sqrt{x}-12x)^2+4dx}\]  \[y = 1.88\]\)

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Your answer is x + 12

Hope this helped!

Answer:

x+12

Step-by-step explanation:

Correct on test

By using given function, For 2 hours Jose will earn $50 for tutoring.

"Function, is an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable)."

Given function

E (h) = 25h

For each hour Jose earns $25 for tutoring

E (1) = $25

For 2 hours Jose will earn:

E(2) = 25(2)

⇒ E(2) = $50

Hence, By using given function, for 2 hours Jose will earn $50 for tutoring.

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1,500

Step-by-step explanation:

You multiply 75 times 20

a. The percentage of the smokers polled that believed they are discriminated against because of their smoking is 61.8%.

b. The CLT conditions for this sample proportion are satisfied because the sample size is greater than 30, and np and nq are both greater than or equal to 10.

c. To find the 95% confidence interval, first calculate the standard error as follows:  SE = sqrt [p(1 - p)/n]  = sqrt [(0.618)(0.382)/1085]  = 0.018

Using the standard error, the confidence interval can be calculated as:  CI = p ± z*SE = 0.618 ± 1.96(0.018) = (0.582, 0.654)

Therefore, the 95% confidence interval for the population proportion of smokers who believe they are discriminated against is (0.582, 0.654).

d. This confidence interval can be used to conclude that the majority of smokers believe they are discriminated against because it does not include 50%. Since the interval does not include 50%, it suggests that the proportion of smokers who believe they are discriminated against is significantly different from 50%, which is the proportion that would indicate no discrimination.

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The unit price of a mini action figures given the total cost as $18.96 is $4.74.

This is the price per each item of a particular good. We can get unit price by dividing the price of certain number of units of an item by the number of units to find the unit price of that item.

Unit price = Total price of items / total number of items.

Unit price of mini action figures = Total cost of items / Number of mini action figures

= $18.96 / 4

= $4.74

Therefore, the unit price of a mini action figures given the total cost as $18.96 is $4.74.

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The arc length by the given data is 4π cm.

We are given that;

AC≅AD,  ∠C =∠D = 30°

Now,

The arc length formula is:

s = rθ

where s is the arc length, r is the radius, and θ is the central angle in radians.

To use this formula, we need to convert the angle of 120° to radians. We can use the fact that 180° = π radians, so:

120° × π/180° = 2π/3 radians

Then we can plug in the values of r = 6 cm and θ = 2π/3 radians into the formula:

s = 6 × 2π/3 s = 4π cm

Therefore, by the given angle the answer will be 4π cm.

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