Answer:
Option (B)
Step-by-step explanation:
If the probabilities of two events A and B are P(A) and P(B) then the conditional probability of an event that can be derived by the formula,
P(B | A) = 
P(A ∩ B) = P(B|A) × P(A)
P(A ∩ B) = (0.8) × (0.4)
= 0.32
Therefore, Option (B) will be the correct option.
Answer:
42pi or 131.95 yards
Step-by-step explanation:
circumfrence of a circle is 2*pi*r
since you added a side wall 1 yard wide you increase the radius of the circle by one yard
so 2*pi*21= 42pi or 131.95 yards