Answer:
30 is the wrong one because it is not a factor of 100
30 60 90 120
20 40 60 80 100
Step-by-step explanation:
 
        
             
        
        
        
A = LW
A = 2/3 * 3/4
A = 6/12 = 1/2 miles^2
        
             
        
        
        
There are 

 such strings, provided that the ordering of the bits doesn't matter.
 
        
        
        
X4 hm I’m pretty sure that’s it
        
             
        
        
        
Answer: No
Currently we don't have enough information to prove this quadrilateral is a parallelogram. One piece of information that would be useful would be if the other diagonal is bisected. If that's the case, then we have a parallelogram (we would first prove the triangles congruent and then use the corresponding congruent angles to set up the parallel lines). Unfortunately, we only know about one diagonal being bisected, but not both, so we don't have enough info.