Answer:
Step-by-step explanation:
 
        
             
        
        
        
87,602 in expanded form is 80,000+7,000+600+2
 
        
                    
             
        
        
        
So...the diameter is increasing at a rate if 2cm/minute, therefore the radius (1/2 the diameter) is increasing at half the rate. You will learn how to calculate the rate of change at a specific point in time in calculus.
        
             
        
        
        
Answer: -4
Step-by-step explanation:
Solve 2x+7=-1
 2x. =-8 
 x. =-4