Answer:
probably is 140 or is it just the whole question?
 
        
             
        
        
        
The answer to the problem is 6,-6
        
             
        
        
        
Answer:
- Initial amount of the material is 67 kg
- Hal-life is 83 hours
<u>The required equation is:</u>
- m(x) = 67 *  , where m- remaining amount of the radioactive material, x - number of hours , where m- remaining amount of the radioactive material, x - number of hours
<u>After 5 hours the material remains:</u>
- m(5) = 67 *  = 64.260 (rounded) = 64.260 (rounded)