Asked by Tama
A circle whose area is 4 has a radius of x. Find the area of a circle whose radius is 3x.
Answers
Answered by
Anonymous
The answer is 28.26
Answered by
JOHN CENA
The answer is 36.
The formula for area is A = pi*r^2.
Plug in 4 for the area and r for the radius
4 = pi*r^2
divide by pi
4/pi = r^2
Find the square root of both numbers. r = 2/radical pi
Then solve a new equation for area
pi*(3r)^2 = Area
plug in 2/radical pi for r.
3*2/radical pi = 6/radical pi
square that and cancel out the radical
36/pi*pi = A
cancel pi
36 = A
Reasoning: When you multiply the radius by 3 you are multiplying the area by 9 because you square the radius so when the radius is x then it's 3x and when you square it it becomes 9x
The formula for area is A = pi*r^2.
Plug in 4 for the area and r for the radius
4 = pi*r^2
divide by pi
4/pi = r^2
Find the square root of both numbers. r = 2/radical pi
Then solve a new equation for area
pi*(3r)^2 = Area
plug in 2/radical pi for r.
3*2/radical pi = 6/radical pi
square that and cancel out the radical
36/pi*pi = A
cancel pi
36 = A
Reasoning: When you multiply the radius by 3 you are multiplying the area by 9 because you square the radius so when the radius is x then it's 3x and when you square it it becomes 9x
Answered by
anonymous
36 is the area
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.