Answer:
x=4.2
Step-by-step explanation:
7.8x  =   32.76
/7.8          /7.8
x=4.2
 
        
             
        
        
        
4*25=100
The glacier was 100 feet shorter than it was originally by the end of the 25 day period.
Hope this helps :)
 
        
             
        
        
        
1.3 x 0.4 x 2 = 1.04
0.5 x 0.4 = 0.2
(

(0.5 x 1.2)) x 2 = 0.6
1.04 + 0.2 + 0.6 = 1.84m²