Answer:

Step-by-step explanation:
To obtain the result of a fractions multiplication we need to multiply both numerators and the divide by the multiplication of the denomitators. In general, given a,b,c,d real numbers with b and d not zero, we have that

Substituting a,b,c and d for 8,15,2 and 13 we obtain that

 
        
             
        
        
        
Answer:
Last Option

Step-by-step explanation:
We have the Venn diagram that shows the probabilities of occurrence of 3 events A, B and C
In this case, since events A and B and B and C are non-disjoint events, then the probability of occurrence B is the sum of the probability that only B will occur plus the probability of occuring A and B plus the probability that B and C occur
This is:

 .
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7. previously answered in another question, but last choice is correct
8.  yes a diameter is a chord. A chord is any line that connects 2 points on a circle
        
             
        
        
        
5000+0=5000 that is g 
and then 0+100=100-20=80 that is h