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Elenna [48]
3 years ago
15

Find the following for the function f(x)=3x2+2x−3.

Mathematics
1 answer:
N76 [4]3 years ago
8 0

Answer:

- 3

Is the correct answer

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Determine the decibel values of thermal noise power (N) and thermal noise power density (No) given the following: T=292 degrees
Agata [3.3K]

Answer: d. None of the above are correct.

Step-by-step explanation: Noise is a superfluous random alteration in an eletrical signal. There are different types of noises created by different devices and process. Thermal noise is one of them. It is unavoidable because is created by the agitation of the charge carriers, due to temperature, inside an eletrical conductor at equilibrium and is present in all eletrical circuits.

The formula to find the thermal noise power (N) is: N = k_{b}.T.B, where:

k_{b} is Boltzmann constant (1.38.10^{-23}J/K);

T is temperature in Kelvin;

B is the bandwith;

Calculating the thermal noise power:

N = 1.38.10^{-23}·292·40

N = 16118.4.10^{-23} dBm

The thermal noise power [N] = 16118.4.10^{-23} dBm

Noise power density or simply Noise density (N₀) is the noise power per unit of bandwith and its SI is watts per hertz.

For thermal noise, N₀ = kT, where

<em>k </em>is the Boltzmann constant in J/K;

T is the receiver system noise temperature in K;

N₀ = 1.38.10^{-23} . 292

N₀ = 402.96.10^{-23} W/Hz

The thermal noise power density [N₀] = 402.96.10^{-23} W/Hz

7 0
3 years ago
Darnell has $52.50 to spend on clothes. He buys a coat for $31.75 and spends the rest on shirts that cost $8.10 each. Which ineq
tankabanditka [31]

Answer: 31.75 + 8.10s ≤ 52.50

Step-by-step explanation:""""Brainlest anwser""""""

7 0
3 years ago
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Suppose that y varies directly with x, and y=15 when x=24. Write a direct variation equation that relates x and y. Find y when x
Lapatulllka [165]

Just set up a proportion with the original numbers and then the numbers you want to find like so: (x1/y1)=(x2/y2) and since you want to find the second y value, just leave y as a variable like so: (15/24)=(3/y) after this just cross multiply and get the answer: 15y=72.....y=4.8


4 0
3 years ago
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Select the denominator of 4/9
Assoli18 [71]
The denominator is the one on the bottom so 9 is the denominator the top is the numerator
5 0
3 years ago
How many states were added in the US between 1795 and 1855
Stels [109]
There were 16 states added. 
Tennessee, Ohio, Louisiana, Indiana, Mississippi, Illinois, Alabama, Maine, 
Missouri, Arkansas, Michigan, Florida, Texas, Wisconsin, and California

7 0
3 years ago
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