A = πr^2
D = r • 2
R = D/2
7/2 = 3.5
R = 3.5
A = πr^2
A = 3.14 • 3.5^2
A = 3.14 • 12.25
A = 38.465
A = 38.47
So therefore the area of the circle is 38.47!
Answer:
a
Step-by-step explanation:
Answer:
No real solutions.
Step-by-step explanation:
Square both sides:

Evaluate the discriminant:
$\Delta =3^2-4 \times 1 \times 4$
$= 9-16=-7<0$
Since $\Delta $ is less than zero, there are no real solutions.