So your present value is 7750. this is what you have now. they give you the intesrest rate which is 4% and how the amount of year is 5. 
recall the formula for a compounded continously is
P×e^(r×t)
the answer is 7750×e^(.04×5)
        
             
        
        
        
The answer is A, because $9,841.28 minus $7,429.84 is <span>$2,411.44</span>
        
                    
             
        
        
        
Circumference of circle = π × Diameter
= π × 18 cm
= 56.54867 or 56.54 to 1 dp
 
        
             
        
        
        
When written in scientific notation, 3,900  = 3.9 x 10^3