So, imagine the trainer is in the very middle of the circle and he is holding out a rope that's attached to the horse. The rope here from the trainer to the horse represents the radius of the circle. The horse trots around the trainer (middle point) in a circle.
The formula to find area of a circle is A = pi*r^2 (pi times r squared where r is radius)
We know that the radius of the "circle" here formed as the horse trots around the trainer is 31 (the 31 foot long rope). 
So let r = 31 & plug the value into the formula to find circle area.
A = pi*31^2 = 3019.07054
The area is therefore 3019.07 square feet. (rounded)
        
             
        
        
        
Answer:  There are 32 candles in the small box.
Step-by-step explanation:
Since we have given that 
Size of small box= 2 ounces
Size of large box = 6 ounces
Number of candles in large box = 96,
We need to find the number of candles in the small box ,
As there is direct variation between the small box and large box ,
let the number of candles in the small box be x
So,

so, there are 32 candles in the small box.
 
        
             
        
        
        
16x-15-9x=13
7x-15=13
 +15 +15
x=4
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
-7y = -10x - 8
y = 10/7x + 8/7
 
        
             
        
        
        
9514 1404 393
Answer:
   8%
Step-by-step explanation:
The fraction donated was $632/$7900.
As a percentage, that is ...
   632/7900 × 100% = 0.08 × 100% = 8%
The store donated 8% of sales to charity.