Answer:

Step-by-step explanation:
Given: 
KL ║ NM , 
LM = 45
m∠M = 50° 
KN ⊥ NM  
NL ⊥ LM 
Find: KN and KL 
1. Consider triangle NLM. This is a right triangle, because NL ⊥ LM. In this triangle,
LM = 45 
m∠M = 50°
So,

Also
 (angles LNM and M are complementary).
 (angles LNM and M are complementary).
2. Consider triangle NKL. This is a right triangle, because KN ⊥ NM . In this triangle,
 
 
 (alternate interior angles)
 (alternate interior angles)
 (angles KNL and KLN are complementary).
 (angles KNL and KLN are complementary).
So,

and 

 
        
                    
             
        
        
        
Answer: The level of aspirin (mg) will be in your bloodstream in 4 hours = 35.70 mg.
Step-by-step explanation:
If the amount is decreasing by r%, then the final amount is given by :-

, where P = initial value , t= time
Given: P= 200 milligram, r= 35% = 0.35, t= 4 hours
The level of aspirin (mg) will be in your bloodstream in 4 hours = 

Hence, the level of aspirin (mg) will be in your bloodstream in 4 hours = 35.70 mg.
 
        
             
        
        
        
Answer:
2.5 hours
Step-by-step explanation:
it takes him 2.5 hours