Probably the last one
Use the equation for the area of a triangle 1/2(bxh)
Then multiply that number by 2 to get the area of the complete shape.
 
        
        
        
Answer:
 = 40/3    =  13  1/3   
Step-by-step explanation:
8/1 ÷ 3/5     =   8/1 x 5/3
                          8 x 5 = 40
                           1 x 3 = 3
 = 40/3    =  13  1/3
 
        
             
        
        
        
Answer:
Step-by-step explanation:
8:60 is the rate 
Divided by 2
4:30
So, she could run 4 kilometers in 30 minuets. 
Divide by 2 again.
2:15
She can run 2 kilometers in 15 minuets.