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
Kipish [7]
3 years ago
13

What is the circumference of a circle if the radius is 4?

Mathematics
2 answers:
inysia [295]3 years ago
6 0

Answer:

25.1cm

Step-by-step explanation:

since circumference =\pid and d=2r

c=\pi(2*4)

c=8\pi

c=25.132741229

c=25.1cm

artcher [175]3 years ago
6 0

Answer:

90.8

Step-by-step explanation:

cercumference=πD

r=2×D

<h2>C=2πr</h2><h2><u>c</u><u>=</u><u>2</u><u>×</u><u>π</u><u>×</u><u>4</u></h2><h3>π=22/7 or 3.14 so,</h3>

C=90.8

You might be interested in
PLEASE PLEASE PLEASE HELP ME
lubasha [3.4K]

Answer:

CE = 17

Step-by-step explanation:

∵ m∠D = 90

∵ DK ⊥ CE

∴ m∠KDE = m∠KCD⇒Complement angles to angle CDK

In the two Δ KDE and KCD:

∵ m∠KDE = m∠KCD

∵ m∠DKE = m∠CKD

∵ DK is a common side

∴ Δ KDE is similar to ΔKCD

∴ \frac{KD}{KC}=\frac{DE}{CD}=\frac{KE}{KD}

∵ DE : CD = 5 : 3

∴ \frac{KD}{KC}=\frac{5}{3}

∴ KD = 5/3 KC

∵ KE = KC + 8

∵ \frac{KE}{KD}=\frac{5}{3}

∴ \frac{KC+8}{\frac{5}{3}KC }=\frac{5}{3}

∴ KC + 8 = \frac{25}{9}KC

∴ \frac{25}{9}KC - KC=8

∴ \frac{16}{9}KC=8

∴ KC = (8 × 9) ÷ 16 = 4.5

∴ KE = 8 + 4.5 = 12.5

∴ CE = 12.5 + 4.5 = 17

7 0
3 years ago
Which shows all the values of x that make the rational expression undefined? x = 6 x = 7 x = –6 or x = 6 x = –7 or x = 7
n200080 [17]
<h2>Explanation:</h2>

The rational expression is given by:

E=\frac{2x^2-72}{5x^2-245} \\ \\ Factor \ out: \\ \\  E=\frac{2(x^2-36)}{5(x^2-49)} \\ \\ E=\frac{2(x-6)(x+36)}{5(x-7)(x+7)} : \ \ \ \ a^2-b^2=(a-b)(a+b)

The denominator can't be zero, therefore:

(x-7)(x+7)\neq 0 \\ \\ \\ Thus: \\ \\ \boxed{x\neq 7 \ and x \neq -7}

Finally,<em> the values of x that make the rational expression undefined are </em>

<em></em>

<em>x = 7 and x = -7</em>

4 0
3 years ago
I lost my two brain cell trynna work it out pls help lol​ I'll brainlist everyone who have a try at this!!!
Jlenok [28]

Answer:

A) r x 2 = g

B) b - 5 = g

C) b x 4 = g

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
I need help ASAP, with numbers 3-6 above. Please help.
MatroZZZ [7]

Answer:

3. 2 6 30          6. 8:5

   3 9 45

Step-by-step explanation:

6 0
3 years ago
How many times can 7 go into 50
Damm [24]

Answer:

7 without going over

Step-by-step explanation:

3 0
4 years ago
Other questions:
  • 213 is 30% of what amount
    10·1 answer
  • Answer this please. Identify the vocabulary word that matches the picture. *​
    8·1 answer
  • 9th grade math please help
    6·1 answer
  • Find the equation of the line that has a slope of 14 and passes through the point (-3,12).
    6·1 answer
  • Please help me answer this !
    15·1 answer
  • Whats the median of (20, 15, 14, 16, 17, 12, 20, 22)
    11·1 answer
  • 0) Craig buys a ring for $500. He sells it for $750.
    6·2 answers
  • Pls help ASAP need help pls
    8·2 answers
  • All of the following are equivalent except _____.
    11·2 answers
  • A=<br> B=<br> C=<br> ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!