Answer:
add x
Step-by-step explanation:
I think it's a b not sure about the rest though
3a
C = 2πr = 2π(7) = 14<span>π or 14 x 3.14 = 43.96 ft
3b
</span>A = πr^2 = 49π or 49 x 3.14 = 153.86 ft^2
<span>
3c
3.5 x 78.5 = $538.51
cost = $</span>538.51<span>
</span>
Answer:
The secondary attack rate is 55%
Step-by-step explanation:
Total number of students = 83
Primary cases: cases A+B+C = 3 primary cases.
Secondary cases = 44
Total cases = 44 + 3 = 47
To find the secondary attack rate, we are to assume that the primary cases are now immune because they had the illness.
We have:
Secondary attack rate = 
The secondary attack rate is 55%