In 1912, the U.S. government began issuing licenses to radio stations. Each station was given a unique three-letter call sign. Radio stations in the western United States were given call signs starting with K. Stations in the east were given call signs starting with W. For example, the radio station with the call sign ABC is KABC in California, and WABC in Georgia.



a. How many different three-letter call signs are there?

Hint: don’t worry about the K or W – just find the number of ways to arrange any 3 letters



b. How many different three-letter call signs are there where the first letter is a D?

Hint: again, the K and W don’t matter



c. In a random selection of radio station call signs, what is the probability of selecting a radio station with a call sign that starts with the letter D?

Answers

Answer 1

Answer:

A would make sense

Step-by-step explanation:


Related Questions

Henry rode his motorcycle from his house to a friend's house. After riding 10 miles, he realizes he has traveled 2/3 of the way. How far is Bob's house from his friend's house?
A. 20 miles
B. 15 miles
C. 12 miles
D. 25 miles​

Answers

Step-by-step explanation:

2/3 of diatance = 10 miles

3/3 of distance = 10 * (3/2) = 15 miles.

The distance between the houses is 15 miles. (B)

Let the total distance covered= x

Distance covered= 10 miles

According to the question,

2/3 of x= 10

=> 2/3 × x= 10

=> 2x/3= 10

=> 2x= 10× 3

=> 2x= 30

=> x= 30/2

=> x= 15

Bob's house is 15 miles away from Henry's house.

Evaluate the following expression when n = 6.
|n - 6| - |5 - n|

Answers

Answer:

-1

Step-by-step explanation:

1. Substitute n with 6 because n=6

2. Then you simply solve both sides so (6-6)-(5-6) because n=6

3.so then you get the absolute value of 0 subtracted by the absolute values of -1

4. So because all absolute values change it to positive you get 0-1 instead of 0- - 1

5. So the final answer is -1

Sorry if this was confusing, I’m really bad at explaining. :)

Answer:

|n-6|-|5-n|

=|6-6|-|5-6|

=|0|-|-1|

=0-1

=-1

The price of an Item yesterday was $160. Today, the price rose to $248. Find the percent increase.

Answers

Answer:

jguifutrdduturdrfuy

Step-by-step explanation:

Find factors of following polynomial
A) 7 + 4 + 56 + 32 B) + 9 + 8 + 72
C) (42− 12 + 9 2− 92 )
plz answer properly
I will mark the person brainliest who answers properly

Answers

Step-by-step explanation:

the cotrect one is C

❤❤❤❤

use the diagram below to find the lengths of the following answer question 18-25. Be sure to include all necessary work. Leave your answer in the simplest radical form when necessary.

Answers

Answer:

18. AE = 6

19. BG = 6

20. CF = 5

21. GF = 2

22. CE = 3

23. AC = 3·√5

24. A_F = 10

25. DA = 3·(√5 - 1)

Step-by-step explanation:

Whereby the point C is the center of the circle, we have;

CB = CG = CE = 3 = The radius of the circle with center at C

CE = 3

CF = √(4² + 3²) = 5 by Pythagoras' theorem

CF = 5

GF = CF - CG = 5 - 3 = 2

GF = 2

BG = CB + CG = 3 + 3 = 6

BG = 6

Whereby, BC is a tangent to the circle with center, C, we have;

A_F = √(8² + 6²) = 10 by Pythagoras' theorem

A_F = 10

AE = A_F - EF = 10 - 4 = 6

AE = 6

AC = √(6² + 3²) = 3·√5 by Pythagoras' theorem

AC = 3·√5

DA = AC - CD = 3·√5 - 3 = 3·(√5 - 1)

DA = 3·(√5 - 1).

PLEASE ANSWER FAST
Answer like
number 1. answer is _________________
number 2. answer is _________________
number 3. answer is _________________
number 4. answer is _________________
number 5. answer is _________________

Answers

Answer:

number 1. answer is 561%

number 2. answer is 1

number 3. answer is 7/80

number 4. answer is 31.25%

number 5. answer is 60%

Step-by-step explanation:

hope this helps!

Answer:

1. 561%

2. 1

3. 7/80

4. 31.25%

5. 6%

Step-by-step explanation:

To start off, lets learn how to convert decimals to percent's.

Converting is actually not too hard. All you need to do is multiply the decimal by 100.

So 5.61 * 100

That would be 561 and then you add a percent sign to the end.

To convert a percent to a decimal is just the opposite of what we just did. Simply divide the percent by 100.

So 100% /100

A number divided by itself is 1

So 100% = 1

To make this problem easier, you can convert the fraction to a decimal.

8 3/4 = 8.75%

Now divide it by 100

8.75/ 100

0.0875

Now just convert it back to a fraction.

0.0875 = 7/80

Convert to a decimal.

5/16 = 0.3125

Multiply by 100

31.25

add percent sign

31.25%

Last one.

Convert to decimal

3/5 = 0.6

Multiply by 100

6%

If you need help on conversions or anything else don't be afraid to reach out! I hope this helps!

Ann received a $70 gift card for a coffee store. She used it in buying some coffee that cost $8.21 per pound. After buying the coffee, she had $45.37 left on her card. How many pounds of coffee did she buy?

Answers

Answer:

She bought 3 pound of coffee.

Step-by-step explanation:

70 - 45.37 = 24.63

24.63 ÷ 3 = 8.21

Answer:

3 pounds

Step-by-step explanation:

The cost of one apple and one banana at the school canteen is $1 and the cost of 3 apples and 2 bananas is $2.40. Find the cost of a single banana, using simultaneous equation, elimination method. Show full working out.

Answers

Answer:

I don't know

I don't know

let the apple equal to x and let the banana equal to y

Equation one is x+y= 1

Equation two is 3x+2y= 2.40

Because we are doing the elimination method, multiply all of equation one by 3


3x+3y=3
3x+2y=2.40
(subtract the equations from one another)


So now you have y=60 cents

So, one banana costs 60 cents

Reagan found chips for sale at two stores. At Store A, the chips were 6 bags for $4. At store B, the chips were $6 for 4 bags. Reagan said the unit rate was 1:1.5. Which store did she find the unit rate for
PLEASE SOLVE
WILL GIVE BRANLIEST

Answers

Answer:

Store B

Step-by-step explanation:

Please mark brainliest.

Algebra 1 plz help me

Answers

Answer:

Step-by-step explanation:

solution is (4,3)

OR

x=4

y=3

this point lies in both the tables.

we have to find a pair which lies on both.

What is the polar form of (x + 3)2 + y2 = 9?

r = −6 cos(θ)
r = −3 cos(θ)
r = 3 cos(θ)
r = 6 cos(θ)

Answers

Answer:

r = -6 cos(θ)

Step-by-step explanation:

got it right on edge

The equation (x + 3)² + y² = 9 into polar form is r = -6 cos(θ). The correct answer would be option (A).

What is the polar form?

The polar form of a complex number is given by r(cos(θ) + i sin(θ)), where r is the distance from the origin and θ is the angle formed by the point and the positive x-axis.

To convert the equation (x + 3)² + y² = 9 into polar form, we can complete the square on the x and y terms:

(x + 3)² + y² = (x² + 6x + 9) + y² = 9

Then we can express x and y in terms of r and θ:

x = r cos(θ) , y = r sin(θ)

Substituting these values into the equation and simplifying:

r² cos²(θ) + 6r cos(θ) + r² sin²(θ) = 9

r²(cos²(θ) + sin²(θ)) + 6r cos(θ) = 0

r² + 6r cos(θ) = 0

r(r + 6cos(θ)) = 0

Since r ≠ 0

So, the polar form of the equation is:

r = -6cos(θ)

Thus, the correct answer would be an option (A).

To learn more about the Polar Coordinates click here:

https://brainly.com/question/614180

#SPJ5

Rick has a piece of lumber that is 12 feet long. He cuts it into pieces that are each 3/4 of a foot long. How many pieces of 3/4 foot lumber will he be able to make?

Answers

Answer:

He will be able to make 16 pieces of lumber

Step-by-step explanation:

what is 3/4 divided by 1/2​

Answers

3/4 divided by 1/2 is 1.5 or 6/4.

If all people were pea pickers, then how long would it take for the entire population of Earth to pick 1 mol of peas at the rate of one pea per second, working 15 hours per day, 365 days per year

Answers

It will take [tex] 1.392 \times {10}^{10} \: years[/tex] for the entire population of the Earth to pick a mole of pea at the specified rate.

1 mole of a substance is given by :

[tex]6.022 \times {10}^{23} [/tex]Rate per person = 1 pea per second

Working 15 hours per day ; 365 days per year

1 person will pick = (1 × 365 × 15) = 5475 peas per year

Taking the world population as 7,900,000,000 people

Number of peas picked per year = (7,900,000,000 × 5475) = 43252500000000

The time taken to pick 1 mole of pea will be :

1 mole of pea ÷ Number of peas picked per year

[tex] \frac{6.022 \times {10}^{23} }{4.325 \times {10}^{13} } = 1.392 \times {10}^{10} \: years[/tex]

The time taken to pick 1 mole of pea will be

[tex]1.392 \times {10}^{10} \: years[/tex]

Learn more : https://brainly.com/question/18904995

Doug is analyzing the daily profits from the past month for three of his restaurant franchises. He has calculated the mean and standard deviation of the data, in dollars, as shown below.
Location A Location B Location C
Mean = 6,127.85
SD = 413.51 Mean = 6,296.07
SD = 440.67 Mean = 6,191.28
SD = 330.83

For which store does 68% of the data lie between $5,714.34 and $6,541.36 (1 SD from the mean)?


2.
For which location does 95% of the data lie between $5,529.62 and $6,852.94 (2 SD from the mean)?


3.
Which location had the highest average daily profit during the past month?

Answers

Answer:

it is b a c on plato

Step-by-step explanation:

Name the plane represented by the front of the box.
BJC, DBF, GBF, or CAB

Answers

Answer:cab

Step-by-step explanation:

Answer: c. GBF

Step-by-step explanation:

Ashlee purchases gifts for three friends. She chooses a book for $12.80 and then finds two identical necklaces. Her budget is is $48.00 before tax. What is the maximum she can spend on each necklace?

Answers

Answer: $17.60

Step-by-step explanation:

48.00-12.80=35.2.

35.2/2

17.60

Then divide by 2 to get the maximum you could spend on each.

21) Karen gets paid $5 for every hour plus $15 a day when she works in her neighbor's yard. If she made $40 yesterday, how many hours did she work?

show the work.

Answers

Karen worked 8 hours

Answer:

40/5 = 8

So Karen worked 8 hours yesterday.

Step-by-step explanation:

Help ???? Please it will be appreciated

Answers

The answer is 200 metres as the price increases by 3.9 for every increase in 30 metres.
The person above me is correct. I did the math

Which is a correct expansion of the following expression?

18(x – 3) – 26


A. 18x – 80

B. 18x + 80

C. 18x + 28

D. – 62x

Answers

Answer:

A. 18x – 80

Step-by-step explanation:

18(x - 3) - 26

18x - 54 - 26

18x – 80

The answer is a. 18x - 80

Because first you will expand the brackets, for this you will multiply everything that is outside the bracket to what’s inside (18 times x) which will give you 18x and (18 times -3) which will give you -54

Now your equation will be

18x -54 - 26

Next you will workout the liked terms with are -54 and -26, since they are both negative just add them together and keep the sign.

To get your final answer

18x -80

find the x in the given triangle and at last do the proof...please help​

Answers

Answer:

x = 42.67

Step-by-step explanation:

please answer the following ​

Answers

Answer:

it 10

Step-by-step explanation:

square root of 58 ... to solve using the pythagorean theorem use the formula: a^2+b^2=c^2 . so plug in how many blocks the first point is to the second point. u should get 7^2+3^2=c^2 . so you should get 58=c^2. do the square root of 58 and you should get the answer b !!!

The answer to this question

Answers

Answer:

divide 9 and 21

Step-by-step explanation:

if you divide 9 and 21 u will get ur answer

what is the volume of a regular octahedron inside a cube with the length of its sides measuring 4 centimeters ​

Answers

Answer:

We conclude that the volume of a regular octahedron will be:

[tex]\:\:V\:\approx \:30.17[/tex] cm

Step-by-step explanation:

Given

The length of one of the side or edge of a regular octahedron = a = 4 cm

To determine

The volume of a regular octahedron = V

Using the formula to determine the volume of a regular octahedron

[tex]V\:=\:\frac{\sqrt{2}}{3}a^3[/tex]

substituting a = 4 in the volume equation

[tex]V=\frac{\sqrt{2}\cdot \:4^3}{3}[/tex]

[tex]V=\frac{64\sqrt{2}}{3}[/tex]         ∵ 4³ = 64

[tex]\:\:V\:\approx \:30.17[/tex] cm

Therefore, we conclude that the volume of a regular octahedron will be:

[tex]\:\:V\:\approx \:30.17[/tex] cm

is this answer, right?

Answers

Answer:

1) Incorrect should be 35%, 2)incorrect should be 23%

Step-by-step explanation:

37 + 24 = 61   61 + 54 = 115   115 + 36 = 151 college students

1) 54  =   x                    2)  36 = x

  151 = 100                       151 = 100

151x/151 = 5400/151    151x/151 = 3600/151

     x = 35.7...                      x = 23.8...

  do not round              do not round

up since you can't      up since you can't

 get more people       get more people

which COULD be the new coordinates of point D?

Answers

Answer:

It is B

Step-by-step explanation:

4, -4 is longer than 2 units

-2, -2 is longer than 2 units

-1, -4 is longer than 2 units

What are the coordinates of point A?


Answers

Answer:

the left side should be -5 the other side should be 7

Answer:

(7, -5)

Step-by-step explanation:

I need help with the problem that is in the attached image.

Answers

Answer: c

Step-by-step explanation: i did the test

HELP I'LL GIVE BRAINLIEST TO THE CORRECT ANSWER!!! THIS IS TIME PLZ HELP!!!
(look at the screenshot)
Ruby is visiting San Francisco. From her hotel she walks 2 blocks east and 4 blocks north to a coffee shop. Then she walks 6 blocks west and 5 blocks north to a museum. Where is the museum in relation to her​ hotel? SHOW YOUR WORK!!!

The museum is __ blocks(s) __ (east or west) and __ block(s) (north or south) of her hotel.

Answers

Answer:

2 blocks west and 5 steps north

Step-by-step explanation:

4 blocks west. (6 west minus 2 east)

9 blocks north. (4 north plus another 5 north)

Grab a piece of graph paper to get a visual

Find the value of x. Use the photo I uploaded to help plz.
A. X=2
B. X=3
C. X=33
D. X=52

Answers

The answer should be option B
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