Area of a circle is directly proportional to the square of radius of the circle while the circumference is proportional to the radius of the circle. This means that if the radius of a circle is increased x times, then its area will be increased to x^2 times the original area, and the circumference will increase to x times the original circumference.
Thus when the radius is doubled, or in other words if radius mad 2 time the original radius, the area of circle will become 2^2 = 4 time the original area. The circumference will become 2 times the original circumference.
We can calculate exact area and circumference of a circle from its radius using the following equations:
Area of circle = (pi/4)*r^2
Circumference of circle = 2*pi*r
Where r is the radius of the circle.
I know this is a lot, sorry.
Answer: 
<u>Step-by-step explanation:</u>
There is 1 four out of 6 possible numbers = 
Answer/Step-by-step explanation:
An equation that describes the relationship can be written as 
.
Using the two sets of coordinates, (2, 140) and (4, 280), calculate the slope (m) as shown below:
Substitute m = 70 into
The equation would be:
This equation can be interpreted as follows:
The heart's resting rate is 70 beats each minute.
X is equal to 8. The work for that is on the attached picture.
