1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jeka57 [31]
3 years ago
13

A circle with radius 4 centimeters.

Mathematics
2 answers:
victus00 [196]3 years ago
5 0

Area=πr²

Area=π*4²

Area=π*16

Area=16π cm²

B.

Vaselesa [24]3 years ago
4 0

Answer:

16pi cm2

Step-by-step explanation:

Area of a circle = pi * radius * radius = pi * 4 cm * 4 cm = 16pi cm2

You might be interested in
ANSWER PLEASE!!!!! ASAP!!! THANKS!!
GREYUIT [131]

Answer:

The answer is 64.

Step-by-step explanation:

To find the volume of a prism, you multiply l x w x h (length x width x  height). The length is 8, width is 4, height is 2. 8 x 4 = 32, 32 x 2 = 64.  

hope this helped plz tell me if i was right!!!

8 0
2 years ago
In 3 hours , a car travels 120 miles. What’s is the speed of the car?
atroni [7]
40 because you would divide the miles by hours to find the rate of change. 

120/3= 40
7 0
2 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
Please help me with this problem, and can you also show steps. thank you
Maurinko [17]
Convert all the improper fractions into mixed numbers, then simplify. Then, you do the operations.
7 0
3 years ago
Read 2 more answers
Y=-7 + 2x how to graph
blondinia [14]
I know for 2x you would go up 2 over 1 but I don’t know about -7?? Maybe down
8 0
2 years ago
Other questions:
  • 3! + 0! / 2! * 1! =<br> a). 3/2<br> b). 3<br> c). 7/2<br> Pls i need help quick
    6·2 answers
  • Find the slope and the y-intercept. PLEASE HELP ASAP
    7·1 answer
  • HELP ME PLEASE! THANK YOU! :)
    11·1 answer
  • Solve for x: -2x + 1 = -6
    11·1 answer
  • What is 1 1/4-1/3 equal to as an fraction
    14·1 answer
  • Find the degree of the monomial.<br> -4a^4
    6·2 answers
  • HELPP PLS THIS IS MY LAST CHANCE I HAVE ONLY A COUPLE MORE MINTUES..ㅠㅜㅜㅠ
    13·2 answers
  • Help me i will give the best answer branliest
    8·2 answers
  • David gets 65 chocolates an hour for cleaning. He gets a 15% raise. He cleans for 60 hours this week. How many more chocolates w
    5·2 answers
  • Find the slope of the lines (-3,-1) and (-6,-10)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!