Answer:
A) 45 degrees
Step-by-step explanation:
 
        
             
        
        
        
The question describes a binomial probability with p(h) = p, then p(t) = 1 - p and number of trials (n) = 20
The probability of a binomial distribution is given by 

Part A:
The probability of observing 8 heads and 12 tails is given by:

Part B:
<span>You observe more than 8 heads and more than 8 tails, when you observe 9 heads and 11 tails, 10 heads and 10 tails, and 11 heads and 9 tails.
Therefore, the probability of </span><span>observing more than 8 heads and more than 8 tails</span> is given by:
 
 
        
        
        
87,602 in expanded form is 80,000+7,000+600+2
 
        
                    
             
        
        
        
6x+5y=-15
5y=-15-6x
y=(-15-6x)/5
        
                    
             
        
        
        
Let the planned number of parts per hour = x 
<span> Then the planned number of parts for the day = 8x 
</span><span> By finishing 4 more parts in an hour than was planned (x + 4) he fulfilled his daily task in 6 hours. 
</span><span> So he finished 6(x + 4) parts that day. 
</span><span> 6(x + 4) = 8x 
</span><span> 6x + 24 = 8x 
</span><span> 2x = 24 
</span><span> x = 12 </span>