Answer:
1) 8    2) 125   3) 1,680   4) 5,040   5) 3,024
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
60 minutes including the 15 minute rest.
Step-by-step explanation:
450/10 is 45. Therefore, biking for 45 minutes will loose 450 calories, 10 calories per minute.  Maybe half way during the 45 minutes Spencer will take the 15 minute rest. This brings the biking trip 60 minutes.
 
        
             
        
        
        
There is a way to work it out with a pencil and paper, but that's too complicated 
to try and explain with only text, like we have here.
I don't usually recommend this for things that can be done easily on paper ...
but for square roots, your best bet is to use a calculator.
The square root of 30 does not come out even.  It starts out  5.477225...
and it keeps going and never ends.
The negative of  5.477225... is also a square root of 30.  Every number has 
two square roots ... the positive and negative of the same number.  
        
                    
             
        
        
        
Answer:
Distance between -23 & 17 = 40
Step-by-step explanation: