Answer:
it's obtuse. reason being cause to be acute it has to be under 90 and to be right it has to be at 90
 
        
                    
             
        
        
        
I believe your answer would be D.) because the triangles were already proven to be congruent
        
             
        
        
        
Total discount for 10 group tickets = 10 · 0.05t
Amount of discount per ticket = 0.05t
Number of tickets = 10
Cost of buying 10 single tickets = 10t
Solution:
Cost for single ticket = t dollars
Discount percent per ticket = 5% 
Number of tickets bought = 10
Total discount for 10 group tickets = Number of tickets × Discount amount
                                                          = 10 × 0.05t
Total discount for 10 group tickets = 10 · 0.05t
Amount of discount per ticket = 5%t
                                                   =  t
 t
                                                   = 0.05t 
Amount of discount per ticket = 0.05t
Number of tickets = 10
Cost of buying 10 single tickets = 10t
 
        
             
        
        
        
Y = -3x + b
Plug in points
4 = -3(-2) + b
4 = 6 + b, b = -2
Solution: y = -3x - 2
        
             
        
        
        
1-.8=.2
za/2=.2/2=.1
invNorm(.1)=1.28