<span>It is clear to see that 0.0259 is less than 0.05. A p-value that is less than the confidence level of alpha indicates that there is sufficient evidence from the data that the null hypothesis should be rejected in favor of an alternative hypothesis.</span>
        
             
        
        
        
Answer:
7) a = 65; b = 50
8) c = 125; d = 55; e = 52
9) f = 105
Step-by-step explanation:
7) 
a = 65
b + 130 = 180
b = 50
8)
c = 125
d + 125 = 180
d = 55
e = 52
9)
(180 - f) + 32 + (180 - 107) = 180
180 - f + 32 + 180 - 107 = 180
-f + 285 = 180
-f = -105
f = 105
 
        
                    
             
        
        
        
∠DBC = 19° since the two angles have to add up to 180, if x = 23, then 23 -4 = 19 for the right, and 7 x 23 = 161, and 161 + 19 = 180.
        
             
        
        
        
The tree is 20 m tall . 
Step-by-step explanation:
<h2>Given : </h2>
- 2m tall tree cast a shadow 4 m long .
 => 2 m tree = 4 m long 
If we find shadow of 1 m tall tree = 4/2 
=> we have to find height of 10 m tall tree which is .. = 4/2 × 10 = > 20 m 
 
        
             
        
        
        
20 times 10 is 200 divided by 2 is 100. so 100 cm squared