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Lubov Fominskaja [6]
3 years ago
7

there are 98 girls at Ross elementary there are 15 less boys then girls how many boys and girls are at Ross elementary​

Mathematics
1 answer:
Luba_88 [7]3 years ago
8 0
Answer: 98-15= 83 boys
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If Mars has a diameter of approximately 4200 miles, what is the volume of Mars.
Alex777 [14]

Answer:

Dimplified: 3.88×10^{10}, or 38,800,000,000

Unsimplified: 38,792,400,000

Step-by-step explanation:

Remember, the volume of a sphere is V=\frac{4}{3}\pi r^{3}

This comes into: 3.87924×10^{10}

As we know, the shape of mars is a sphere.

Let me know if you have a question, or if it lets you not have the ×10^{10}

7 0
3 years ago
Read 2 more answers
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
How far does a bus travel at 2.5 hours at 65mph
oksian1 [2.3K]

the bus goes 65 miles every hour. so: 1hr = 65mi

to find how many miles it goes every 2.5 hours, we multiply each side by 2.5:

2.5hrs = 162.5mi

5 0
3 years ago
Read 2 more answers
Please answer! will give 5 stars, brainliest (if two people answer.), 20 pts, and thanks.
Charra [1.4K]

Answer:

66

Step-by-step explanation:

Angle 2 and 4 are supplementary, so if angle 4 is 123, then 180-123=57.

So angle 2 is 57.

Then, if angle 2 and 3 are 57 and we know that all angles of a triangle have to add up to 180, then:

                             57+57+angle 1=180

                                114+ angle 1=180

                                        angle 1= 66

3 0
2 years ago
The difference of Ellen’s age and her sister Mary’s age is 4 years. Ellen is 5 years less than twice Mary’s age.
Paha777 [63]

Answer:

I believe the answer is 9 years old or 8 years old.

3 0
3 years ago
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