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SSSSS [86.1K]
3 years ago
8

The frequency,f kilohertz of a radio wave is inversely proportional to its wavelength, Ym. The frequency of a radio wave that ha

s a wavelength of 3000m is 100 kHz. Find (i) The frequency of a radio wave that has a length of 500m (ii) The wavelength of a radio wave that has a frequency of 800kHz
Mathematics
1 answer:
diamong [38]3 years ago
5 0

Step-by-step explanation:

The frequency of a radio wave that has a wavelength of 3000m is 100 kHz

(a) Wavelength = 500 m

We know that,

f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{500}\\\\f=600\ kHz

(b) Frequency, f = 800 kHz

\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{800\times 10^3}\\\\\lambda=375\ m

Hence, this is the required solution.

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A grab bag contains 7 football cards and 3 basketball cards. An experiment consists of taking one card out of the bag, replacing
8_murik_8 [283]
Hello!

The chance of getting a football card is 7 / 10
The chance of then getting a basketball card is 3 / 10

Multiply these two numbers

7/10 * 3 / 10 = 21/100

21/100 = 0.21

The answer is 0.21 or 21%

Hope this helps!
8 0
2 years ago
Read 2 more answers
F(x)=2x+6
mrs_skeptik [129]

Answer:

The Correct option is B. B.-10x^2-48x-54

Therefore the product of f and g. is

F(x)\times G(x)=-10x^{2}-48x-54

Step-by-step explanation:

Given:

F(x)=2x+6

G(x)=-5x-9

To Find:

The product of f and g.

F(x) × G(x) = ?

Solution:

The product of f and g.

F(x)\times G(x)=(2x+6)(-5x-9)

Applying Distributive Property we get

F(x)\times G(x)=(2x(-5x-9)+6(-5x-9)\\=-10x^{2}-18x-30x-54\\

Combining like terms we get

F(x)\times G(x)=-10x^{2}-48x-54

Therefore the product of f and g. is

F(x)\times G(x)=-10x^{2}-48x-54

7 0
2 years ago
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X = 16 is a solution for the equation 17 + x = 33 true or false
lilavasa [31]
\begin{gathered} 17+x=33 \\ 17+x-17=33-17 \\ x=16 \end{gathered}

its true

4 0
10 months ago
A 7<br> B 17<br> C 49<br> D 61<br> Proving Angles Congruent
OLEGan [10]
7x +2x+27 = 180
9x +27 = 180
-27 -27
9x = 153
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x = 17

ANSWER: B
5 0
2 years ago
I need help pleaces ​
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Answer:

probable

Step-by-step explanation:

Because green has the most so it will more probable

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