Answer:
 1430
Step-by-step explanation:
S=450+70T
S= 450 + 70(14)
 S=450+980
 S=1430
 
        
             
        
        
        
Answer:
I think it's 900
Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:  
We are given the following function in the question:

We have to derivate the given function.
Formula:

The derivation takes place in the following manner

