Answer:
The third answer
Step-by-step explanation:
(side note: You probably need to use a calculator that can calculate pi) 
The formula to find the area of a circle is pi r squared. 
In this case, pi times r squared is 19.63495....... continued 
This is probably going to be rounded 
so... 19.63 
For all of the circles, this is multiplied by 4. 
This is 78.52 
The area of the square is 100 cm since 10 times 10 is 100 
You take 100 cm and then subtract it by 78.54
Voila! now you have 21.46
 
        
                    
             
        
        
        
Kilo is the unit prefix for multiplication by one thousand. Therefore, a kilogram, or kg, is equal to one thousand grams. To convert grams to kilograms, you simply have to multiply the number of kilograms to grams.
So, for example, if you had 16.24kg of a compound, it would equal:
 
        
                    
             
        
        
        
Answer:
6.25, 12.5
Step-by-step explanation:
The sequence goes divide by 4 then multiply by 2 
 
        
             
        
        
        
Find the number that when multiplied with 350 will give you 24.5. This number happens to be .07 or in terms of sales tax, 7%.