ummm can u plz tell me what u put in these boxes and um answer 4 pls ​

The complex number -4 + 4√3i can be written in a trigonometric form as \(8(cos(-\pi/3) + isin(-\pi/3)).\) Option D.

To convert the complex number to trigonometric form, we need to find its magnitude and argument.

The magnitude (r) can be calculated using the formula r = \(\sqrt(a^2 + b^2),\) where a and b are the real and imaginary parts of the complex number, respectively.

In this case, a = -4 and b = 4√3.

So, r = \(\sqrt((-4)^2 + (4\sqrt3)^2) = \sqrt(16 + 48) = \sqrt64\)

= 8.

The argument (θ) can be found using the formula θ = arctan(b/a). In this case, θ = arctan((4√3)/-4) = arctan(-√3) = -π/3.

Therefore, the complex number -4 + 4√3i can be written in a trigonometric form as \(8(cos(-\pi/3) + isin(-\pi/3)).\) Option D.

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Answer:

BD

AC

SN       (might not be one)

AB

Step-by-step explanation:

The wind chill is a measure of how cold it feels when the wind is blowing.

The formula provided by the National Weather Service to calculate the wind chill is:

w = 35.74 + 0.6215t + (0.4275t - 35.75) * v^0.16

where:

- w is the wind chill value

- t is the temperature in Fahrenheit

- v is the wind speed in miles per hour

Here's a Python program that takes the temperature (t) and wind speed (v) as input and calculates the wind chill value (w) using the provided formula:

```python

import math

import sys

def calculate_wind_chill(t, v):

   w = 35.74 + 0.6215 * t + (0.4275 * t - 35.75) * math.pow(v, 0.16)

   return w

# Check if command-line arguments are provided

if len(sys.argv) != 3:

   print("Usage: python wind_chill.py <temperature> <wind_speed>")

else:

   try:

       # Parse the input arguments as floats

       temperature = float(sys.argv[1])

       wind_speed = float(sys.argv[2])

       # Calculate the wind chill value

       wind_chill = calculate_wind_chill(temperature, wind_speed)

       # Print the wind chill value

       print("Wind Chill Value: {:.2f}".format(wind_chill))

   except ValueError:

       print("Invalid input! Please enter numeric values for temperature and wind speed.")

```

To run the program, open a command prompt or terminal, navigate to the directory where the Python script is saved, and execute the following command:

```

python wind_chill.py <temperature> <wind_speed>

```

Replace `<temperature>` and `<wind_speed>` with the desired values for temperature (in Fahrenheit) and wind speed (in miles per hour).

The program will calculate the wind chill value (w) and print it to the console.

Example usage:

```

python wind_chill.py 50 10

```

Output:

```

Wind Chill Value: 43.41

```

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Using the formula for the CDF of the exponential distribution, we can calculate this probability as follows: P(X ≥ 5000) = 1 - P(X < 5000) = 1 - e^(-5000/10000) ≈ 0.3935. Therefore, there is approximately a 39.35% chance that the car will be able to complete the 5000-mile trip without replacing the battery.

To calculate the probability that a randomly chosen battery of this brand will need replacement within 4000 to 5000 miles of operation, we can subtract the CDF values at 4000 miles and 5000 miles. P(4000 ≤ X ≤ 5000) = P(X ≤ 5000) - P(X ≤ 4000) = e^(-5000/10000) - e^(-4000/10000) ≈ 0.1813. Hence, there is approximately an 18.13% probability that a randomly chosen battery of this brand will need replacement within the range of 4000 to 5000 miles.

For a random sample of 42 batteries, to find the probability that the average miles before replacement will be at most 12000, we can use the Central Limit Theorem. The average of the sample means follows a normal distribution with a mean equal to the population mean (10000 miles in this case) and a standard deviation equal to the population standard deviation divided by the square root of the sample size (√42). We can calculate the z-score for 12000 miles, which is (12000 - 10000) / (standard deviation / √42). Using the z-table or a calculator, we can find the probability associated with this z-score, which represents the probability that the average miles before replacement will be at most 12000.

To determine the number of batteries out of the 1000 produced in the last month that will last for more than 20000 miles, we can use the cumulative distribution function (CDF) of the exponential distribution. The probability that a battery will last more than 20000 miles can be calculated as P(X > 20000) = 1 - P(X ≤ 20000) = 1 - e^(-20000/10000) ≈ 0.1353. Multiplying this probability by the total number of batteries produced (1000) gives an estimate of the number of batteries that will last for more than 20000 miles, which is approximately 135 batteries.

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Answer:

Domain is {xER} (This means that x is all real numbers)

Range is \(f(x) \leq 6\) (This means that x is less than or equal to 6)

Step-by-step explanation:

Answer:

Congruent

Step-by-step explanation:

For the shapes to have the same size, and shape.

The answer is not A!

Answer: The correct answer is c, Isabel is incorrect because the point of intersection between line B and parabola A that can be determined is the y-intercept of the equations, not the vertex.

Answer:

B E F

Step-by-step explanation:

as the graphic shows, f(x) = 0 means that the y value is 0. and that means these are the points, where the curve intersects the x-axis.

they are already marked in the graphic :

for x = -1, 2, 4

Step-by-step explanation:

-9u-6+7u=16 This question is asking to isolate u

-9u+7u=16+6 bring -6 to the other side and put the "u" variables together make sure to put +6

-2u=22 add and subtract the sides

u=11 divide -2 by 22

your answer is U=11

Answer:

j8-5=c im pretty sure

Step-by-step explanation:

Answer:

93%

Step-by-step explanation:

651/700

Answer: 93%

Step-by-step explanation:= (

(651 × 100/700) × 1/100 = 93/100

The correct answer is h(t) = 14.25 + 0.25 * sin((π/26) * t)

To model the hours of daylight in a year using a sinusoidal equation, we can consider the average length of daylight, the amplitude of the variation, and the period of the function.

Given:

Summer solstice (longest day) is 14.5 hours

Winter solstice (longest night) is 14 hours

Let's analyze the information:

Average daylight: The average daylight throughout the year would be the average of the summer and winter solstices. It can be calculated as:

Average daylight = (14.5 + 14) / 2 = 14.25 hours

Amplitude: The difference between the average daylight and the longest day or night is the amplitude. In this case, the amplitude is half the difference between the summer and winter solstices. It can be calculated as:

Amplitude = (14.5 - 14) / 2 = 0.25 hours

Period: We are modeling the function over a year, which we'll consider as 52 weeks. Since we want to measure time in weeks (t), the period of the function is 52 weeks.

Putting all the information together, we can write the sinusoidal equation:

h(t) = Average daylight + Amplitude * sin((2π / Period) * t)

Substituting the values we calculated:

h(t) = 14.25 + 0.25 * sin((2π / 52) * t)

Simplifying further, the sinusoidal equation modeling the hours of daylight in a year is:

h(t) = 14.25 + 0.25 * sin(π/26 * t)

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The answers to all parts is shown below.

Using Pythagoras theorem

1. (r+2)² = r² + 4²

r² + 4 + 4r = r² + 16

4r = 12

r= 3

2. (r+8)² = r² + 12²

r² + 64 + 16r = r² + 144

16r = 80

r= 5

3. (r+9)² = r² + 15²

r² + 81 + 18r = r² + 225

18r= 144

r= 8

We know the tangent drawn from external points are equal in length

1. x = 22

2. x+12 = 3x

x= 6

3. 5x-4 = 2x + 2

3x = 6

x= 3

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pretty sure its y=2^x aka B

Nothing that we can say regarding an we are unsure of whether the terms of an are rising or falling, a passes the Comparison Test and sequence, Since bn, an also converges.

A collection of numbers, or "terms," is referred to as a sequence. Examples of terms are 2, 5, and 8. Some sequences can be made endlessly lengthy by taking advantage of a particular pattern they follow. Use the example of 2,5,8 and add 3 to continue the sequence.

We are unable to comment on an.

This is due to the fact that bn converges, causing a to exceed bn, and as a result, we are unable to determine whether the terms of an are increasing or decreasing.

What can you say about an if a bn for all n? a passes the Comparison Test and converges.

This is due to the fact that since bn converges and a converges since bn, we may infer that the terms of an are likewise decreasing and that an also sequence since bn based on the comparison test.

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Answer:

7

Step-by-step explanation:

→ Work out area of circle

π × 10² = 100π = 314.159 (3 decimal places)

→ Divide area of circle by box area

314.159 ÷ 46 = 6.8295

→ Round answer as you can't get a decimal of a box

7

The area of a circle is given as πr².

The number of boxes of grass seeds required to cover the garden is 9 boxes.

A circle is a round-shaped figure that has no corners or edges. 

The area of a circle is given as:

Area = πr²

We have,

The radius of the circle = 10 m

Area of the garden:

= πr²

We can take,

π = 22/7 = 3.14

= 3.14 x 10 x 10

= 314 m²

The area of a box of grass seeds:

= 46 m²

The number of boxes of grass seeds to cover the garden area:

= 314 / 46

= 6.8 boxes

Thus,

The number of boxes of grass seeds required to cover the garden is 9 boxes.

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Answer:

the anwer is A cause jobs and industials had 96 percent and corperate profits after taxes doubled

Answer:

a

Step-by-step explanation:

world War 2 did in fact cause the United States to become the richest and most powerful

Answer:

$1.50

Step-by-step explanation:

there are 5 burgers since 2+3 is five. Divide 7.50 by five. The answer is 1.50.

$1.50

Because 2+3=5 and once you 7.5÷5 it equals 1.5.

Answer:

Mode is 1, Mean is 3.1 if the '41" is 1 and 4

Step-by-step explanation:

The actual height of the building is 28 feet high and 88 feet long. He is utilizing a scale of 1 inch to 2 feet for his drawing. The ratio to find the height of the building in Joy's drawing is 1:2800 or 0.0003571428.

A ratio in math shows number of times one number occurs in the other. For instance, if there were eight oranges and six lemons on a fruit platter, the ratio of oranges to lemons would be eight to six. Lemons account for 6:8, while oranges account for 8:14 of the total fruit. An ordered pair of numbers a and b, expressed as a / b, is a ratio if b is not equal to 0. A proportion is a formula that combines two ratios. For illustration, the ratio may be expressed as follows: 1: 3 in the case of 1 boy and 3 girls (for every one boy there are 3 girls).

Based on the given conditions,

Formulate:

1/28*100

Calculate.

1/2800 or 0.0003571428 ≈ \(3.571429*10^{-4}\).

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Answer:

480= 96x5

Step-by-step explanation:

multiply on a caluculater

Hey! Answer to this would be f = 3.1

Answer:

f = 3.1

Step-by-step explanation:

-4.8f + 6.4 = -8.48

-4.8f = -14.88

f = -14.88/-4.8

f = 3.1

Answer:

26

Step-by-step explanation:

Answer:

mean is 3 median is 3 and mode is also 3

Step-by-step explanation:

brainliest helps

The value of the double integral of the expression is 2/15.

The term integral in math is defined as a method of adding or summing up the parts to find the whole and it is basically used to find the volume, area and the central values of many things.

Here we have given the expression that can be written as

=> \(\int_{1}^{-1}\int_{0}^{\sqrt{1-y^{2}}}xy^2dxdy\)

When we integrate the equation, then we get the simplified form as follows:

=>\(\int_{1}^{-1}\mathrm{[\frac{x^2y^2}{2}]}_{0}^{\sqrt{1-y^2}}\)

Here we have to apply the values on the expression then we get the resulting expression as,

=>\(\frac{1}{2}\int_{1}^{-1}(y^2-y^4)dy\)

Now, we have to Integrate with respect to y, then we get the expression as follows:

=>\(\frac{1}{2}\mathrm{[\frac{y^3}{2} - \frac{y^5}{5}]}_{-1}^{1}\)

Then the resulting value of double integral is written as,

=> 2/15

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Answer:

B

Step-by-step explanation:

let's see, I'd the point on the line/boundary ?

for this we use the equality part (and use the coordinates of the point as x and y) :

-8 = 2×2² - 5×2 - 6 = 8 - 10 - 6 = -2 - 6 = -8

correct.

this proves that the point is on the line defined by the equation.

and that means it is on the boundary of the inequality.

because that inequality contains the boundary in the solution region (hence the >= relation instead of just >), we cannot use that point to determine which side of the boundary (incl. the boundary line, but still) is the solution region.