Answer:
see explanation
Step-by-step explanation:
Using De Moivre's theorem
Given
[ 4(cos15° + isin15° ) ]³, then 
= 4³ [ cos(3 × 15°) + isin(3 × 15°) ]
= 64 (cos45° + isin45° )
= 64 ( +
 +  i )
 i )
= 64 ( (1 + i) )
 (1 + i) )
= 32 (1 + i)
 (1 + i)
= 32 + 32
 + 32 i
 i
 
        
             
        
        
        
Number 1s answer would be 2. and number 2s answer would be 2
        
                    
             
        
        
        
Answer:
She messed up because if a bouquet costs $2.50 then 2.50 times 40 is $100 so she could have saved 20 more dollars