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
Naddika [18.5K]
3 years ago
14

What is the circumference of the following circle r = 1

Mathematics
2 answers:
Gre4nikov [31]3 years ago
8 0

Answer:

C = 2pi

C ≈ 6.28

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi*r

C = 2 * pi *1

C = 2 * pi

Using 3.14 as an approximation for pi

C = 2*3.14

C = 6.28

strojnjashka [21]3 years ago
7 0

Answer: C≈6.28

Step-by-step explanation:

C=2π r=2· π ·1≈6.28319

Therefor, the answer is 6.28

* hopefully this helps:)Mark me the brainliest:)

You might be interested in
18 – 12 + x = 10 What value of x makes the equation true?
drek231 [11]

Answer:

4

explanation:

well 18 minus 12 would equal 6. correct? so we would add x to 6 so the new equation would be 6 + x = 10 or to make it easier just do 10 - x = 6

5 0
3 years ago
Read 2 more answers
Are cracks in rock mechanical or chemical weathering
guajiro [1.7K]
Answer: Chemical weathering
its the breakdown of rocks by chemical reactions that change the rocks' makeup, or composition.
3 0
3 years ago
Solve for e E= mc2 m=3 c=6 what is the answer please
alina1380 [7]
E=mc^2 if m=3 and c=6

e=3(6^2)

e=3(36)

e=108
8 0
3 years ago
Read 2 more answers
Once again assistance is needed. Help!!!!
tatiyna

Answer:

D

Step-by-step explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
The table shows the number of medical clinics and the number of bowling alleys in several cities.
DedPeter [7]

Answer:

Step-by-step explanation:

a) to create a scatter plot for the data, let data for clinics be x and that one for Bowling alleys be y then plot x values with corresponding y values on a graph tool.

<u>x                     y</u>

14                   12

1                      3

6                     6

5                     7

10                    7

6                      8

11                      9

8                      15

6                       7

16                     12

The scatter plot is attached below

b) a cluster is a group of data that is close together. From the plot, the ordered pairs forming a cluster are;

(6,6), (6,7), (5,7), and (6,8)

c) An outlier is a point in a plot which lies very far from the other values. In this case, point its  point (8,15)

d)The linear regression equation is one written in the form of

Y=a+bX where ;

Y=the dependent variable

X=the explanatory variable

a=the intercept, which is the value of y when x=o

b=slope of the line

The formula to apply here is ;

a=(∑y)(∑x²)-(∑x)(∑xy) / n(∑x²)-(∑x)² where n is number of samples

b= n(∑xy)-(∑x)(∑y) / n(∑x²)-(∑x)²

Form a table like below

<u>x                     y               xy               x²                 y²</u>

14                   12              168            196              144

1                      3                 3               1                   9

6                     6                 36            36                 36

5                     7                 35             25                49

10                    7                 70             100              49

6                      8                 48             36              64

11                      9                99             121               81

8                      15               120             64            225

6                       7                42               36              49

16                     12                192            256            144

83                     86              813           871               850------------sum

∑x=83   ∑y=86  ∑xy=813  ∑x²=871  ∑y²=850 and n=10

Applying the formula

a=(∑y)(∑x²)-(∑x)(∑xy) / n(∑x²)-(∑x)²

a=[(86 * 871) - (83*813) ]/ 10 (871-83²)

a=[74906 - 67479] / 10(-6018)

a=[7427] / -60180

a= - 0.1234

b= n(∑xy)-(∑x)(∑y) / n(∑x²)-(∑x)²

b=10(813)-(83*86) / 10 (871)-(83²)

b=[8130-7138] / 8710 -6889

b= 992/1821

b=0.5448

The liner regression equation will be;

Y=a+bX

Y= -0.1234 + 0.5448 X

e) correlation coefficient r is given by;

r= n∑xy - (∑x)(∑y) / √n(∑x²)-(∑x)² × √n(∑y²)-(∑y)²

r=10*813 - (83*86) / √10 *871 -83² ×√10*850 - 86²

r=8130-7138 / √8710-6889 × √8500-7396

r= 992 / (√1821 × √1104)

r=992/ 42.67×33.23

r=992/1417.9

r=0.6996

f) r² is important because it shows you the proportion of the variance of one variable that is predictable from the other variable.

r=0.6996

r²=0.6996² =0.4894

8 0
3 years ago
Read 2 more answers
Other questions:
  • The width of a rectangle is 3x+5 and the length of the rectangle is 6x+10. Determine the ratio of the width to the perimeter.
    13·1 answer
  • A party rental company has chairs and tables for rent. The total cost to rent 4 chairs and 8 tables is $89 . The total cost to r
    11·2 answers
  • Three aluminum cans can be recycled to make a new can. How many new cans can eventually be made from 243 aluminum cans? (Remembe
    8·1 answer
  • (5/3)^-2<br> (9/11)^-1 <br> brainlest
    7·2 answers
  • At what coordinates do the lines a and b intersect?<br> Lines b and c intersect in Quadrant ______.
    11·1 answer
  • Girl come/asx-gjeo-pyj​
    11·1 answer
  • A debt of $648 is evenly split among 3 friends.
    7·2 answers
  • Moreira is comparing prices at two video game rental companies rebound game rental charges a base fee of four dollars and an add
    5·1 answer
  • A school has 147 third graders. The third grade teachers have planned a special treat for the last day of school and brought ice
    14·1 answer
  • The vertex angle of isosceles triangle is 110. what are the measures of the base angles
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!