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Yuliya22 [10]
3 years ago
13

The radius of a circle is 6.1 cm. Find the circumference \textit{to the nearest tenth}to the nearest tenth.

Mathematics
1 answer:
den301095 [7]3 years ago
6 0

Answer:

circumference = 2\pi \: r \\  = 2 \times 3.14 \times 6.1 \\  = 38.3 \: cm

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Find the circumference of a circle whose area is 24
zalisa [80]

The answer is: " 17.35 " .

__________________________________

→ The circumference of the circle is: " 17.35 units " .

__________________________________


The area, "A", of a circle:

A = \pi * r² ;

Note: \pi  = 3.14 .

The area of the circumference, "C", of a circle:

C = 2 \pi r .

__________________________________________

Given:

A = 24 ;

Use the formula for the area, "A" of a circle, to find the radius, "r" .

Then, plug the value obtained for "r" into the formula for the circumference, "C" , of a circle:

C = 2\pi r l

To solve for the circumference, "C", of the circle.

________________

A = \pi  *  r^{2} ;

24 = 3.14 * r² ;

↔ 3.14 * r² = 24 ;

Divide each side of the equation by "(3.14)" ;

[3.14 * r²] / 3.14 = (24) / (3.14) ;

to get:

→ r² = 7.64331210191 ;

Take the positive square root of each side of the equation;

to isolate "r" on one side of the equation; & to solve for the radius, "r" ;

→ ⁺√(r²) = ⁺√(7.64331210191) ;

to get:

→ r = 2.76281034802 ;

____________________________

Now, plug this "obtained value" for the radius, "r" into the equation for the formula for the circumference, "C" of a circle:

→ C = 2 \pi * r ;

to solve for the circumference, "C", of the circle:

→ C = 2 * (3.14) * (2.76281034802) ;

= (6.28) * (2.76281034802) ;

= 17.3504489856 ;

→ round to: " 17.35 units" .

__________________________________

The answer is: " 17.35 " .

__________________________________

→ The circumference of the circle is: " 17.35 units " .

__________________________________

6 0
3 years ago
A bag contains green marbles and red marbles, 77 in total. The number of green
PilotLPTM [1.2K]

Answer:4

Step-by-step explanation: 77 in total

subtract 77 from 1 to get 76, multiplied by 4 would get you 304. and how many times would 77 go into 304. divide it from 77 and you will get 4.  

4 0
3 years ago
Which graph represents the solution set of this inequality?
Alenkinab [10]

Answer:

Choice A

Step-by-step explanation:

Hopefully this helps!

7 0
2 years ago
Read 2 more answers
Answer ASAP <br><br><br>Find the circumference of the given circle (7 inches) <br><br>use pi (3.14)
Firdavs [7]

Answer:

43.98

Step-by-step explanation:

is 7 inches the radius or the diameter?

if 7 inches is the radius then 43.98 is the answer

if 7 inches is the diameter 21.99 is the answer

7 0
3 years ago
Need help due tomorrow plese
Sav [38]
The answers to the questions

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3 years ago
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