Answer:
350
Step-by-step explanation:
The difference is 35, she's spending 35 everyday
 
        
             
        
        
        
F=ar^t if the half-life is 96 years...
.5=r^96
ln(.5)=96lnr
ln(.5)/96=lnr
r=e^((ln.5)/96)
f=800e^(336(ln.5)/96)
f=70.71
So about 71mg will remain after 336 years.
        
                    
             
        
        
        
Answer:
is this actually a question
Step-by-step explanation:
 
        
                    
             
        
        
        
Lines R and S are parallel. 
this seems like a geometry question and I’m in Algebra so I probably shouldn’t even try to answer this.