The area of a circle uses the radius of a circle, which is 1/2 the diameter.
In the calculation the radius is squared.
Since the diameter of the larger circle is twice as large the radius would be 2 times.
2 squared would be: 2^2 = 4
This means the area of the larger circle is 4 times larger which would make the ratio 4:1
Answer:
x = 18 + 9y/2
x-18 = 9y/2
(x-18)x2=9y
2(x-18)=9y
2(x-18) / 9 = y
y= 2(x-18)/9
Step-by-step explanation:
<em>Simplify 9/2y to 9y/2</em>
<em>Then Subtract 18 from both sides</em>
<em>Now Multiply both sides by 2</em>
<em>Then Regroup the terms</em>
<em>now divide both sides by 9</em>
<em>Then you will Switch sides</em>
Answer:
Step-by-step explanation:
Given that
Area of a circle 
Circumference of the circle 
Let us re-write the equation of area of circle:


Multiplying and dividing with 2:

Hence, <em>A</em> in terms of <em>C</em> can be represented as:

Answer:
It should take 10 years
Step-by-step explanation:
In 1 year, if it triples, it should be 15 (population), and so on.
15
45
135
405
1215
3645
10935
32805
98415
295245
Answer:
degree
Step-by-step explanation:
The angle between the bottom of the ladder and the ground is given by

Where
B = distance between wall of house and the foot of ladder
L = Length of the ladder
Substituting the given values we get -
