Answer:

Step-by-step explanation:
r = Radius of semicircle = 
Area of semicircle is given by

The area of the semicircle is
.
Answer:
The answer is
x= -35
Step-by-step explanation:
x/5= -7
x= -35. :-)
Answer:
D and C
Step-by-step explanation:
because EF is diameter
then radius diameter divided by 2
You do 132 ÷ 6 which is 22, so that is the answer. This is because if you the auditorium is filled, then there are a total of 132 seats. If there are 6 rows, then there have to be 22 seats each row to make 132 seats. I hope this helps!