Answer:
 C
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C. x^14
Step-by-step explanation:
(x^9)^0 is 1
(x^7)^2 is x^14
x^14*1 is x^14
The Answer is C. x^14
Hope this helps!
 
        
             
        
        
        
Answer: provided in the explanation segment
Step-by-step explanation:
(a). from the question, we can see that since that б is known, we can use standard normal, z.
we are asked to find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? 
 ⇒ 80% confidence interval for the average weight of Allen's hummingbirds is given thus;
x ± z * б / √m
which is 
3.15 ± 1.28 * 0.32/√10 
= 3.15 ± 0.1295 = 3.0205 or 3.2795
(b). normal distribution of weight (c) б is known
(c). option (a) and (e) are correct
(d).  from the question, let sample size be given as S
this gives';
1.28 * 0.32/√S = 0.15
√S = (1.28 * 0.32) / 0.15 = 2.73 
S = 7.4529
cheers i hope this helps