MATHEMATICS HIGH SCHOOL

(URGENT) The frequency of a radio wave varies inversely as its wavelength. If a 250-meter wave has a frequency of 1,200 kilohertz, what is the wavelength of a wave that has a frequency of 6,000 kilohertz? Round your answer to the nearest meter.A 28,800 m

B 1,250 m

C 100 m

D 50 m

Answers

Answer 1
Answer:

Answer:

50 m

Step-by-step explanation:

The frequency of a radio wave varies inversely as its wavelength. This means that:

f α 1 / λ

=> f = c / λ

c is the constant of proportionality

Note: c is called the speed of the radio wave

A 250-meter wave has a frequency of 1,200 kHz.

This implies that:

1200 * 1000 = c / 250

=> c = 250 * 1200 * 1000

c = 300000000 m/s

Therefore, to calculate the wavelength of a wave that has a frequency of 6,000 kilohertz:

6000 * 1000 = 300000000 / λ

=> λ = 300000000 / 6000000

λ = 50 m

Its wavelength is 50 m.

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Brenda’s scores on the first three of four 100-point science tests were 95, 92, and 89. What score does she need on her fourth science test to ensure an average score of at least 93?. . A) X ≥ 96. B) X ≤ 90. C) X ≥ 88. D) X ≤ 92

Answers

The average is equal to the mean of the data set. It is the total of the data or numbers given divided by the ordinal unit of the data set. In this case, we are given with scores of 95, 92, and 89. To have an average of at least 93, the fourth score should be : 
95 + 92 + 89 + x ≥ 93 * 4 where 4 is the number of data points. 
x ≥ 96. Test score should be equal or greater than 96.
average of 93

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A

What times what equals 11, but if you add the numbers together you get 12.

Answers


The pair of numbers you want is

     11
and
      1.
11 * 1 = 11

Now, 11 + 1 = 12

Answer: 11 and 1

I'm giving 50 points and brainliest answer to whoever can answer this... Please show your work so I can try to understand it xD <3

Answers

Ok, to solve this first you have to set up your proportion:

9/150=x/230

/ is a fraction

x= the number of vials it will take to treat 230 patients

in order to solve this, you have to cross multiply:

9 x 230= 2070

150 · x= 150x

so you get 150x=2070

then divide 2070 by 150

2070/150= 13.8

so it would take 13.8 vials of medicine to treat 230 patients
Okay, firstly, you want to work out how many people will 1 vial of malaria treat. So, you do this: 

150 divided by 9= 16.6

That means for every 1 vial, 16.6 people are treated.

Since the question asks you to find out how many vials are needed if you're required to treat 230 people, you would do this:

230 divided by 16.6= 13.8

That means you need 13.8 vials to treat 230 people.

Im taking the common core algebra 1 regent and im horrible at math and on top of that i have a really bad math teacher and learned no math this year can some on help he find a site or anything that can help me get at least a 70 (ps. im not a bad student i just hate math my other regents i got high 90's)

Answers

This site can help you.

During the Age of Exploration, stretching from the 1400s to the 1900s, which of the following regions was the focal point for global trade and exchange of culture? A Option A: Pacific B Option B: Atlantic C Option C: African D Option D: Asian

Answers

Answer:

The correct answer is Option B: Atlantic

Step-by-step explanation:

During the Age of Exploration, stretching from the 1400s to the 1900s, the Atlantic region was the focal point for global trade and exchange of culture.

During the Age of Exploration, the European ships traveled extensively overseas around the world to search new trading routes.

you are saving $30 each month. you have a goal to accumulate $700 in savings. how long will it take you?

Answers

$700 ÷ $30 = approximately 23 months
It will take you 23 1/3 months or rounding 23 months the way you get the answer is you is you divide the goal over the amount of money each month 700/30.
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