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
harina [27]
3 years ago
8

A circle has a radius of length r. If you mark off an arc on the circle of length 2r what is the measurement of the angle that s

ubtends the arc?
A 2pi radians
B. 2 pi r radians
C. 2r radians
D. 2 radians
Mathematics
2 answers:
Inessa05 [86]3 years ago
6 0
A full circle has a circumference of 2πr and an angle of 2π radians.

Set up a proportion:
2πr - 2π rad
2r - x rad

2\pi r \times x = 2\pi \times 2 r \\
2\pi r x=4 \pi r \\
x=\frac{4 \pi r}{2 \pi r} \\
x=2

The answer is D. 2 radians.
marusya05 [52]3 years ago
6 0

Answer: 2 radians

Step-by-step explanation:

You might be interested in
What is the rate of change of the line on the graph below?
Whitepunk [10]
The rate of change on the line is x line goes to the right and y line goes upward
5 0
3 years ago
Read 2 more answers
Hamish and Harry work as plumbers. Harry earns a dollar more than the amount Hamish earns per hour. The amount Harry earns per h
natulia [17]

Answer:

Hamish and Harry work as plumbers. Harry earns a dollar an hour more than 5/4 the amount hamish earns per hour. harry earns per hour is 2$ less than 7/5 the amount hamish earns per hour. how much do each of them make an hour

Step-by-step explanation:

Let

x is the  amount Harry earns 

y is the amount Hamish earns 

x=(5/4)y+1 ⇒ (x-1)*4/5 = y-------- equation 1

x=(7/5)y-2⇒ (x+2)*5/7 = y-------- equation 2

equals 1 and 2

(x-1)*4/5 = (x+2)*5/7

(4x-4)/5 = (5x+10)/7

(4x-4)*7 = (5x+10)*5

28x-28 = 25x+50

28x-25x = 50+28

3x = 78

x = 26

substitute x = 26 for y=(x-1)*4/5

y = (x-1)*4/5

y =  (26-1)*4/5

y = 20

the answer is

<h3>Harry earns $26 an hour</h3><h3>Hamish earns  $20 an hour</h3>
7 0
3 years ago
Read 2 more answers
Sue bought two shirts on sale. She would have to pay $20.00 for each shirt, but she got them for 25% off. The two shirts also ha
andrezito [222]
$20×.25=$5
$20-$5=$15
$15×.15=$2.25
$15+$2.25=$17.25
$17.25 is your answer
4 0
3 years ago
There are 32 red or blue marbles in a bag. The number of red marbles is 4 more than 3 times the number of blue marbles. Write an
eimsori [14]

Answer:

# red marbles = 25

# blue marbles = 7

Step-by-step explanation:

r + b = 32

r = 4 + 3b

substitute '4 + 3b' for 'r' in the 1st equation

4 + 3b + b = 32

4 + 4b = 32

4b = 28

b = 7

red = 32 - 7

r = 25

5 0
3 years ago
Can people help me please to find the volume about question number 10 please and tell me the answer step by step please I need h
Alecsey [184]
#10
Volume of a cylinder: \pir²h

Plug the numbers in.

\pi3²15 = <span>424
</span>
The volume of the pipe is 424 cm³.
7 0
3 years ago
Other questions:
  • Please factor this problem x^2+7x-8
    10·1 answer
  • The area of an Equilateral triangle is given by the formula A= 3pi squared/4(s)Squared. Which formula represents the length of e
    5·1 answer
  • 1.5 more than the quation of a and 4 is b
    7·1 answer
  • The total cost to stay one night at sleepyhead motel is $119 without breakfast and $124 with breakfast included what is the diff
    5·2 answers
  • What are some good note for Notes for Median and mean
    6·1 answer
  • 2 The value of y is directly proportional
    11·1 answer
  • Suppose that the math team at your school competes in a regional tournament. The math team has 12 members regional teams are mad
    6·1 answer
  • I need someone to explain to me how to solve this, because I need to show my work.
    7·1 answer
  • How do you write (4)(25)-300 as an addition equation
    11·2 answers
  • Please help me quick
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!