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
ss7ja [257]
3 years ago
5

If the circumference is 21+2.5pi what is the area

Mathematics
1 answer:
sdas [7]3 years ago
8 0

________________________________

Circumference = 21 + 2.5 π

Or, 2×π×r = 21 + 2.5 π

or, \: \pi \times r  = \frac{21 + 2.5 π}{2}

or, \: \pi \times r =  \frac{21}{2}  +  \frac{25\pi}{2}

or, \: r \:  = ( \frac{21}{2}  +  \frac{25\pi}{2} ) \div  \frac{22}{7}

or, \: r =  (\frac{7}{22}  \times  \frac{21}{2} ) + ( \frac{7}{22}  \times  \frac{2.5\pi}{2} )

or, \: r =  (\frac{7}{22}  \times  \frac{21}{2} ) + ( \frac{7}{22}  \times  \frac{2.5}{2} \times  \frac{22}{7}  )

or, \: r =  (\frac{7}{22}  \times  \frac{21}{2} ) + ( \frac{2.5}{2}  )

or, \: r =  ( \frac{147}{44} ) + ( \frac{55}{44}  )

or, \: r =  ( \frac{101}{22} )

________________________________

Now, area of the circle

= π r²

=  \frac{22}{7}  \times  \ { \frac{101}{22} }^{2}

=  \frac{22}{7}  \times  \ { \frac{101}{22} } \times  \frac{101}{22}

=   { \frac{101}{7} } \times  \frac{101}{22}

=  \frac{10201}{154}

= 66.24

________________________________

You might be interested in
Gus and Ike carried a total of 84 books to the library. If Gus carried 5 as many books as Ike, how many books did they each carr
Alexus [3.1K]

Answer:

They each carried 25 books each.

Step-by-step explanation:

You get this by doing

84/5=16.8

then you do

84/2/5= 8.4

8.4+16.8=25.2

but round to whatever 5 or higher bump up below 5 keep the same

so your answer results in 25.

3 0
4 years ago
Mr de guzman bought 7 1/2 of meat.He used 2 3/4 for afritada,3 1/8 kg for menudo and the rest for pochero.How many kilograms of
nasty-shy [4]

Answer:

hola puto

Step-by-step explanation:

bggyyhh yyesws kihtwrqas bts23e4gyhun

7 0
3 years ago
A bag contains yellow marbles and blue marbles, 42 in total. The number of yellow marbles is 2 less than 3 times the number of b
Juliette [100K]
There are 31 yellow marbles. Work is attached.
4 0
4 years ago
Read 2 more answers
Help, please I need a mathswatch answer this is from the mathswatch website
torisob [31]

Answer:

158.76

Step-by-step explanation:

11.7*15.6=182.52

182.52/2=91.26

Area of BCD=91.26

7.5*18=135

135/2=67.5

Area of BAD=67.5

Altogether:

91.26+67.5=158.76

4 0
3 years ago
Glenna says that the height of her house is 1 yard is her claim reasonable
muminat
No, her answer is not reasonable because one yard is equal to 3 feet.
4 0
3 years ago
Read 2 more answers
Other questions:
  • How am I supposed to solve this? I know how to do the equations but I don't know why there are only 2 places to put an answer fo
    9·1 answer
  • In a group of 50 students, 12 study geography, 9 study history and 6 of these students both geography and history. What is the p
    11·1 answer
  • What is the product property of radicals? Question 4 options:
    5·1 answer
  • what is the smallest length that can be divided exactly into equal sections of length 5m, 8m and 12m​
    12·1 answer
  • 1.) What is the height of the given figure?
    14·1 answer
  • If k= am + 3mx, the value of m in terms of a, k, and x can be expressed as
    7·2 answers
  • Multiply n by 5 then add 4
    9·1 answer
  • Please solve thanks tyyy
    10·1 answer
  • Ifp * (x) = 3x ^ 2 - 4 and r(x) = 2x ^ 2 - 5x + 1 . find value r(x + 2)
    10·1 answer
  • Which table can be created using the equation below?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!