Answer:
Diameter14
Using the formulas
A=πr2
d=2r
Solving for A
A=1
4πd2=1
4·π·142≈153.93804m²
Step-by-step explanation:
 
        
             
        
        
        
Answer:2
Step-by-step explanation:
 
        
                    
             
        
        
        
The slope of the function is most positive either side of x=0 and x=2π.
On the interval [0, π/4], the average slope is 

On the interval [7π/4, 9π/4], the average slope is 

The average rate of change is highest on the intervals [0, π/4] and [7π/4, 9π/4].
 
        
        
        
Step-by-step explanation:
No of hours = 3
Distance in kilometre = 273
Average speed = 273 ÷ 3 = 91 
So 91 is the average speed per hour