In the attachement, there is what I came up with so far. I think that finding 'a' is non-trivial, if possible at all.
- the area of a circle
- the area of a circular segment
Hey There!
3×9=27
27-15=12
Teresa has 12 pieces of Chocolate left
Hope This Helps!!!!
Answer:

Step-by-step explanation:











Frequency describes the number of waves that pass a fixed place in a given amount of time.
Factor
b(b+12)=0
set to zero
b=0
b+12=0
b=-12
b=0 or -12
written as this way
b=-12,0