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
katrin [286]
3 years ago
5

Find the area of a circle whose circumference measures 28 centimeters.

Mathematics
2 answers:
prohojiy [21]3 years ago
8 0

Answer:

Area of circle = 62.459624 square cm .

Step-by-step explanation:

Given: circumference measures 28 centimeters.

To find : Find the area of a circle .

Solution : We have given

circumference =28 cm

circumference = 2 *pi * radius .

Plug the value of circumference = 28 cm , pi = 3.14

28 cm  =  2 * 3.14 * radius .

28 = 6.28 * radius.

On dividing both sides by 6. 28

Radius = 4. 46 cm

Area of circle  = pi (radius )².

Area of circle = 3.14 ( 4.46)².

Area of circle = 62.459624 square cm .

Therefore, Area of circle = 62.459624 square cm .

vagabundo [1.1K]3 years ago
7 0
Assume the radius is R.

2*pi*R = 28 -> R = 14/pi

So the area will be pi*R^2 = 196/pi
You might be interested in
Class A rented 2 filled vans and 7 buses with 407 students. B rented and filled 1 van and 7 buses with 389 students. How many st
almond37 [142]

Answer: 1 van can hold 18 people, and 1 bus can hold 53 people.

What we know: Class A rented 2 filled vans and 7 buses with 407 students.

Class B rented and filled 1 van and 7 buses with 389 students.

What we need to know: How many students can a van carry? How many students can a bus carry?

Equation A: 2v + 7b = 407

Equation B: 1v + 7b = 389

Variables used: v = amount of people that can fill a van and b = amount of people that can fill a bus

This is quite a simple equation, because we know that class A used 1 more van than Class B, and the question says that each vehicle was full. So, all you have to do it subtract 389 from 407 to get 18. That means that 1 can can hold 18 people.

Now you just plug it in to find the value for b, 1(18) + 7b = 389

7b = 371

b = 53

So the amount of people that can fit on a van is 18, and the amount of people that can ft on a bus is 53.

5 0
3 years ago
Answer quick for brainliest.
Aliun [14]
Y = 2x - 4 is the equation for the graph.
4 0
4 years ago
Read 2 more answers
Kenji buys 3 yards of fabric for $7.47 then he realizes that he needs 2 more yards how much will the extra fabric cost
Norma-Jean [14]
You would have to divide 7.47 with 3 which would get you 2.49..you would double that and your answer would be 4.98.
8 0
3 years ago
felicity the clown inflates 2 balloons in 5 minutes, grumpy the clown ties 5 balloon animals in 12 minutes,if felicity maintaine
vfiekz [6]
Felicity inflates 12 Balloons/hr
4 0
3 years ago
Read 2 more answers
in parallelogram ABCD, AB=(6x-2) feet DC=(3x+13) feet and AD=5 feet. Find the number of feet in the perimeter of the parallelogr
sweet [91]

Answer:

66 feet

Step-by-step explanation:

Parallelograms have 2 pair of parallel sides that are congruent to each other.

In parallelogram ABCD, we can say:

AB = DC

and

BC = AD

AB and DC are given, and they are equal. So we can say:

AB = DC

6x - 2 = 3x + 13

Now we can solve for x:

6x - 2 = 3x + 13

6x - 3x = 13 + 2

3x = 15

x = 15/3

x = 5

So,

AB = 6x - 2

AB = 6(5) - 2 = 28

So, DC = 28

We are also given AD = 5, so BC = 5 as well [since AD = BC]

Now, we know the length of all 4 sides.

The perimeter is the sum of all 4 sides. Hence,

Perimeter = 28 + 28 + 5 + 5 = 66 feet

6 0
4 years ago
Other questions:
  • 69+ m - m; use m=8, and q=3
    11·1 answer
  • Patricia is studying a polynomial function f(x). Three given roots of f(x) are -11-square root 2i, 3 + 4i, and 10. Patricia conc
    9·2 answers
  • (35+27)÷4×12= what??
    8·2 answers
  • How can you determine whether a matrix product AB is defined?
    14·1 answer
  • Please help been stuck on this for a hour
    15·1 answer
  • Write an equation for the sentence below. Then solve the equation.
    12·2 answers
  • The price of a laptop is increased by 15%.The old price of the laptop was £300.Work out the new price
    9·1 answer
  • The length of the base of a square pyramid is 15 inches. The slant height is 10 inches. What is the surface area of the pyramid?
    12·1 answer
  • I need help please I don’t understand
    10·1 answer
  • What is the area of these shapes
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!