Similarities: same atomic number
Differences: they have a different number of neutrons
        
                    
             
        
        
        
258 cubic inches
Since the boxes are kind of on their own—>
First box: 7*2*12 = 168
Second box: 5*2*9=90
168+90 = 258
        
             
        
        
        
A=Pe^rt
P=principal(starting)
E= function on calculator 
r= rate
T= time (how long)
        
             
        
        
        
Answer:
Valerie can cut 13 2/3 ft pieces.
Step-by-step explanation:
Please brainliest!