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
lukranit [14]
3 years ago
15

Circle area of a radius of 3

Mathematics
1 answer:
Nat2105 [25]3 years ago
8 0

Answer:

A=28.27

Step-by-step explanation:

You might be interested in
Juan was in debt to his father$4. He then borrowed $3 from his father for lunch. What integer represents Juan's debt to his fath
Yanka [14]
The awnser to this problem is either 12 or 7 by using multiplication or addition
4 0
3 years ago
Read 2 more answers
I really need help on this please help
Delvig [45]
I believe the X numbers are divided by 2, to get the Y numbers. So the blank X box is 1 and the other is 12.


8 0
3 years ago
Can I get help with finding the Fourier cosine series of F(x) = x - x^2
trapecia [35]
Assuming you want the cosine series expansion over an arbitrary symmetric interval [-L,L], L\neq0, the cosine series is given by

f_C(x)=\dfrac{a_0}2+\displaystyle\sum_{n\ge1}a_n\cos nx

You have

a_0=\displaystyle\frac1L\int_{-L}^Lf(x)\,\mathrm dx
a_0=\dfrac1L\left(\dfrac{x^2}2-\dfrac{x^3}3\right)\bigg|_{x=-L}^{x=L}
a_0=\dfrac1L\left(\left(\dfrac{L^2}2-\dfrac{L^3}3\right)-\left(\dfrac{(-L)^2}2-\dfrac{(-L)^3}3\right)\right)
a_0=-\dfrac{2L^2}3

a_n=\displaystyle\frac1L\int_{-L}^Lf(x)\cos nx\,\mathrm dx

Two successive rounds of integration by parts (I leave the details to you) gives an antiderivative of

\displaystyle\int(x-x^2)\cos nx\,\mathrm dx=\frac{(1-2x)\cos nx}{n^2}-\dfrac{(2+n^2x-n^2x^2)\sin nx}{n^3}

and so

a_n=-\dfrac{4L\cos nL}{n^2}+\dfrac{(4-2n^2L^2)\sin nL}{n^3}

So the cosine series for f(x) periodic over an interval [-L,L] is

f_C(x)=-\dfrac{L^2}3+\displaystyle\sum_{n\ge1}\left(-\dfrac{4L\cos nL}{n^2L}+\dfrac{(4-2n^2L^2)\sin nL}{n^3L}\right)\cos nx
4 0
3 years ago
A manufacturer compares its income f(x) to its expenses g(x) for x number of units sold. What does the solution to f(x) = g(x) r
Aliun [14]

Answer: The number of units sold when the manufactures home income equals the manufactures expenses

Step-by-step explanation:

3 0
3 years ago
A student evaluated -4 + x for x = 9 1/2 and got an answer of 5 1/2. What might the student have done wrong?
Vikki [24]
-4+x=9.5
x=13.5

The student might have subtracted 9.5-4, which results in the answer 5.5. The correct answer is 13.5.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Fill in the blanks
    13·2 answers
  • Please help with answers
    10·1 answer
  • Will a 9/32 inch diameter pin fit into a reamed hole with a diameter of 0.278 inch? (Do not round off your answer and express it
    11·1 answer
  • Anthony, who is 2 meters tall, is standing on top of a skyscraper that is 1 km tall. How many meters is it from the top of Antho
    10·1 answer
  • How would i solve these?
    13·1 answer
  • Each of the 22 members of football team is required to participate in the summer car wash fundraiser the coach estimates that ea
    13·1 answer
  • Can you help me please now
    6·1 answer
  • Find the length of BC.<br> A)8<br> B)12<br> C)16<br> D)18
    6·2 answers
  • Solve the inequality and enter your solution as an inequality comparing the
    10·1 answer
  • Compare 9/10 or 90percent'
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!