The area of a circle is pi*r^2.
The angles in a circle add up to 360 degrees.
Let's say I have a circle with radius 2.
The total area of the circle is pi* (2^2) = 4pi
Let's say I cut out 15 degrees of this circle. This piece is 15 out of 360 of the whole circle.
The area of this part is (15/360) * 4pi
The rest of the area is (360-15)/360 * 4pi.
I hope this helps.
Answer:
A).= 1/2 probability of selecting girls.
B).= 1/2
Step-by-step explanation:
because there are 30 boys out of sixty which makes it half the class.
then theres 25 boys out of 50. therefore the answer is 1/2
We are given ratio 27 to 30 that is 27:30.
We need to find the 10% using the rate 27:30.
27:30 could be written in fraction form as 27/30.
On dividing 27/30, we get 0.9.
Now, on multiplying 0.9 by 100, we get 90.
Therefore, 27/30 gives us 90%.
<em>In order to find the 10%, we need to subtract 27/30 from 1 because 1 represents 100%.</em>
1-27/30 = 30/30 -27/30 = 3/30.
<h3>Therefore, 3 is 10% of 30.</h3>
