brae72
21.12.2019 •
Mathematics
If a and b are mutually exclusive events, with p(a) = 0.19 and p(b) = 0.27, what is p(a or b)?
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Ответ:
0.46
Step-by-step explanation:
We know that when two events X and Y are mutually exclusive, then
Given: A and B are mutually exclusive events, with
P(A) = 0.19 and P(B) = 0.2
Now,
Ответ:
Let's assume CD=h, BD=x.
tan 24°=h/x ==>h=x*tan 24°
tan 16°=h/(7600+x)==>h=tan 16° *(7600+x)
==>x tan 24°=tan 16°*(7600+x)
==>x=(7600*tan 16°)/(tan 24°-tan 16°)
h=x*tan 24= (7600*tan 16°*tan 24°)/(tan 24°-tan16°)
b) CD=h=6122,2303...≈6122 (feet)
a) BC=h/sin 24°=15052,0746448...≈15052 (feet)
=