One metre=10 decimetres.
Therefore 30 metres = 30*10=300 decimetres.
        
             
        
        
        
Hello : 
26r3s + 52r5 – 39r2s4  <span>Factor is : 13r²
</span><span>the resulting expression is : 13r²(2rs+4r3 -3s4)</span>
        
             
        
        
        
Answer:
a. dbc = 66, ABC = 132
b. abd = 52, dbc= 52
Step-by-step explanation:
just remember that bisects means that the angles on either side of the middle line are equal. so for a, dbc = abd and ABC = 2x 66
for b, abd and dbc are equal, so both of them are just 104 divide by two