Answer: 63%
Step-by-step explanation:
First find the rate of loss that would cause the average rate of loss over the 10-year period equal to 38.0%. 
Assume that rate is x. 
38 = (36.2 + 29.0 + 46.2 + 37.5 + 40.9 + 40.0 + 32.6 + 40.5 + 40.1 + x) / 10
38 = (343 + x ) / 10
380 = 343 + x
x = 380 - 343 
x = 37%
The survival rate is the opposite of the rate of loss which means that the survival rate is;
= 1 - rate of loss
= 1 - 37%
= 63%
 
        
             
        
        
        
Answer:
108, 108, 72
Step-by-step explanation:
Vertical angles are congruent and if the measure of 1 of the angles is 72 degrees and straight lines equal 180 degrees you have to subtract 72 from 180 which equals 108. 
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Notice that the series: 1 - 3 + 9 - 27 +... clearly has powers of the factor 3 in its terms and it is also an alternate series (the terms alternate from positive to negative). The terms are positive for  (even terms) , while the odd terms
 (even terms) , while the odd terms  are negative. (so most likely there should be a factor   (-1) in the common ratio.
 are negative. (so most likely there should be a factor   (-1) in the common ratio.
We can then represent it with the following summation expression:
 given that each of its first four terms are:
 given that each of its first four terms are:

 
        
             
        
        
        
Answer:
steps and answers in the pic..hope u can understand the calculations...