Answer:
You're clicking on the correct answer, it's cot with that symbol, I dont have the symbol.
cot (x)
Step-by-step explanation:
cot x
---------------
cos x sec x
We know that sec = 1/ cos
cos x 1/ cos x
1
8 11/100, 8.11, Hope this helpe :)
and 
, respectively. The total probability of knocking down at most two is thus 
, or 
.