N = 4
(3)(4)-(2+4) = 12 - 6 = 6
The area of the circle is given as:

Plugging the value of the radius we have that:

Therefore the area in terms of pi is:
Jamal's score is 80
<u>Explanation:</u>
Given:
Number of questions = 100
Let w be the number of wrong answers
Let r be the number of right answers
According to question,
r = 4w
r + w = 100
Solving both the equations we get:
4w + w = 100
5w = 100
w = 20
If w = 20 then r = 4 X 20 = 80
Therefore, Jamal's score is 80
Answer:
The answer is c
Step-by-step explanation: