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
vekshin1
2 years ago
9

i need help A circle with radius 4 sits inside a circle with radius of 11 What is the area of the shaded region?

Mathematics
2 answers:
stiks02 [169]2 years ago
6 0
I'm guessing thet the shaded region is the outer ring.

This has area pi * 11^2 - pi * 4^2

= pi (121-16) = 105 pi  or 330 to nearest whole number.
Harlamova29_29 [7]2 years ago
5 0
If you get the area of the larger circle containing the smaller one, its area includes the smaller's circle's area.

now, if you get the area of the smaller circle and subtract it from the area of the larger circle, you're in effect making a hole in the larger circle, and what's leftover, their difference, is the are not occupied by the smaller circle, since the smaller circle's area subtraction made a hole anyway.

\bf \textit{area of a circle}\\\\
A=\pi r^2\qquad r=radius
\\\\\\
\stackrel{\textit{larger circle}}{A}=11^2\pi \implies \stackrel{\textit{larger circle}}{A}=121\pi 
\\\\\\
\stackrel{\textit{smaller circle}}{A}=4^2\pi \implies \stackrel{\textit{smaller circle}}{A}=16\pi 
\\\\\\
\stackrel{shaded~region}{A}=\stackrel{\textit{larger circle}}{A}-\stackrel{\textit{smaller circle}}{A}\implies \stackrel{shaded~region}{A}=121\pi -16\pi 
\\\\\\
\stackrel{shaded~region}{A}=105\pi
You might be interested in
Finding domain f(x)=3x+1/x-5
arlik [135]
The function is undefinded if the denominator, x-5, equals 0.
So x-5 \neq 0 \\ 
x \neq 5.
The domain is x \neq 5.
In interval notation, this is (-infinity, 5) u (5, infinity).
4 0
3 years ago
Choose one of the factors of x^3 + 343.
Debora [2.8K]

First, note that 343=7^3. Then use the formula for the sum of perfect cubes:

a^3+b^3=(a+b)(a^2-ab+b^2).

Therefore,

x^3 + 343=x^3+7^3=(x+7)(x^2-7x+49).

The quadratic trinomial x^2-7x+49 couldn't be factored anymore, so the expression x^3 + 343 has two factors x+7 and x^2-7x+49.

Answer: correct choice is A.

3 0
3 years ago
Find the rate of change
Bezzdna [24]

Answer: 40 mi/h

Step-by-step explanation:

it goes up 80 and over 2, so the rate of change is 80/2 = 40 mi/h

8 0
2 years ago
im stupid. honestly. just help me pls. this is probably really easy but i aint done any maths in over a month so ion remember ho
KATRIN_1 [288]

Answer:

19 coins

Step-by-step explanation:

We know that mean is the sum of all the elements divided by the number of elements there are: m = t/n, where m is the mean, t is the total sum, and n is the number of elements.

Here, we are given the mean number of coins for all 27 + 18 = 45 children is 16, so m = 16 and n = 45. Then:

m = t/n

16 = t/45

t = 720

This t means that the total number of coins that all the boys and girls have is 720 coins.

Now, we also know the mean number of coins for the boys only, which is 14. Since there are 27 boys, then:

m = t/n

14 = t/27

t = 378

This t means the total number of coins all the boys have.

Subtracting 378 from 720, we get 342, which is the total number of coins the girls have. We also know there are 18 girls, so:

m = t/n

m = 342 / 18 = 19

Thus, the mean is 19 coins.

7 0
3 years ago
Read 2 more answers
Give B= {a,l,g,e,b,r} and C={m,y,t,h} find B U C
masha68 [24]

The union of a collection of sets is the set of all elements in the collection.

We have B = {a, l, g, e, b, r} and C = {m, y, t, h}

<h3>B ∪ C = {a, l, g, e, b, r, m, y, t, h}</h3>
6 0
3 years ago
Other questions:
  • 3 times of 4 yards 2 foot
    11·1 answer
  • A letter used to represent a number is called a _____.
    8·1 answer
  • What is the product of 4x15x25
    8·2 answers
  • What is the perimeter, P, of a rectangle that has a length of x + 8 and a width of y − 1?
    15·2 answers
  • What is the fifth term of the arithmetic sequence 7,3,-1....
    8·1 answer
  • The sum of a number, n, and 8 is multiplied by -4, and the result is 12. What is the number?
    6·1 answer
  • Y divided by 3 is equal to 15
    9·2 answers
  • The point (6, 6) is on the graph y = f(x) . Find the corresponding coordinates of this point on the graph y = 4f[1/3x +9] -7
    13·1 answer
  • 6 times 6 subtracted by 24 plus 8888888566783815829
    6·2 answers
  • Diane has $334 in her checking account. She writes a check for $112, makes a deposit of $100, and then writes another check for
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!