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
Leni [432]
3 years ago
12

The radius of circle A is r cm. The radius of circle B is twice the radius of circle A. What difference between the circumferenc

e of circle B and circle A (in cm)?​
Mathematics
1 answer:
avanturin [10]3 years ago
3 0

9514 1404 393

Answer:

  2πr cm

Step-by-step explanation:

The circumference of a circle of radius r is ...

  C = 2πr

For a radius of (r cm), the circumference is ...

  A = 2π(r cm) = 2πr cm

For a radius of (2r cm), the circumference is ...

  B = 2π(2r cm) = 4πr cm

Then the difference between the circumferences is ...

  B -A = (4πr cm) -(2πr cm) = 2πr cm . . . . difference in circumference

You might be interested in
How do I express a fraction as a percent?<br><br> Ex: 29 over 50
tangare [24]
<span>1. Divide the top of the fraction by the bottom
<span>2. Then multiply the result by 100 and read off the answer! 


</span></span>
4 0
3 years ago
Which is longer 3200 hours or 19 weeks
Katarina [22]
The 1 weeks is longer because the hours is like 53 days and the weeks are like 133 days

3 0
3 years ago
6. There are four-wheel trucks and six-
Nat2105 [25]

Answer:

there are 6 six wheel trucks

Step-by-step explanation:

3 0
3 years ago
2. Use the following picture for this question:
Art [367]

Answer:

a.  24\sqrt{3}  and 41.6

b.  52.1

Step-by-step explanation:

a.

Considering the left side triangle the blue dotted side is the side "opposite" to the angle given and the side 24 is the side that is "adjacent" to the angle given. The trigonometric ratio tan relates opposite to adjacent. Also, let the blue dotted side be y.

<u>Note:</u> the exact value of tan 60 is \sqrt{3}

Thus, we can write Tan(60)=\frac{y}{24}\\y=24*Tan(60)\\y=24*\sqrt{3} \\y=24\sqrt{3}

Approximate value (rounded to nearest tenth):  24\sqrt{3} =41.6

b.

Considering the triangle to the right, the side "opposite" to the angle given (53 degrees) is 41.6 (just found in part (a)) and the side "hypotenuse" (side opposite to 90 degree angle) is x. The trigonometric ratio sine relates opposite and hypotenuse.

Thus we can write and solve:

Sin(53)=\frac{41.6}{x}\\x=\frac{41.6}{Sin(53)}=52.1

4 0
3 years ago
25 POINTS
uysha [10]

Answer:

a reflection over the x-axis and then a 90 degree clockwise rotation about the origin

Step-by-step explanation:

Lets suppose triangle JKL has the vertices on the points as follows:

J: (-1,0)

K: (0,0)

L: (0,1)

This gives us a triangle in the second quadrant with the 90 degrees corner on the origin. It says that this is then transformed by performing a 90 degree clockwise rotation about the origin and then a reflection over the y-axis. If we rotate it 90 degrees clockwise we end up with:

J: (0,1) , K: (0,0), L: (1,0)

Then we reflect it across the y-axis and get:

J: (0,1), K:(0,0), L: (-1,0)


Now we go through each answer and look for the one that ends up in the second quadrant;

If we do a reflection over the y-axis and then a 90 degree clockwise rotation about the origin we end up in the fourth quadrant.

If we do a reflection over the x-axis and then a 90 degree counterclockwise rotation about the origin we also end up in the fourth quadrant.

If we do a reflection over the x-axis and then a reflection over the y-axis we also end up in the fourth quadrant.

The third answer is the only one that yields a transformation which leads back to the original position.

4 0
3 years ago
Read 2 more answers
Other questions:
  • I need help and my teacher wont help
    13·1 answer
  • Raoul rode an elevator up e floors. He entered the elevator on the 5th floor and exited on the 34th floor. Which equation shows
    12·1 answer
  • If f(x)=16x-30 and g(x)=14x-6 for which value of x does (f-g)(x)=0
    6·1 answer
  • The area, A, of a triangle is one-half the product of the triangle's base and height.
    10·2 answers
  • Help me asap
    13·2 answers
  • I need the answer to this . thanks if someone can help me .
    6·1 answer
  • Read the problem in the box below. See if you can figure out the most logical
    10·1 answer
  • Need some help a little bit stuck
    6·1 answer
  • I need to know what goes each box 28 POINTS<br> :)
    13·2 answers
  • Fill in the blank.<br> (4+ 7)*3 = (4 * 3) +
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!