Answer:
Interest rate, R = 244%
Step-by-step explanation:
Given the following data;
Principal = $270
Simple interest = future amount - principal = 309.60 - 270 = $39.60
Time = 22/360 = 0.06 years
To find the interest rate? 
Mathematically, simple interest is calculated using this formula;

Where;
Substituting into the equation, we have;
 
 
Cross-multiplying, we have;
 
 
 
 
 
 
<em>Interest rate, R = 244.44 ≈ 244%</em>
<em>Therefore, the pawnbroker charged Elisa a simple interest rate of 244%.</em>
 
        
             
        
        
        
Answer:
60 miles per hour 
Step-by-step explanation:
if you divide 360 by 6 you will get 60
 
        
                    
             
        
        
        
We know it begins at 100. If we use a*b^t, then 100 is our a. 100*b^t. We can now divide 480 by 100. This is 4.8. 4.8 is b. f(t) = 100(4.8)^t
        
             
        
        
        
C. Plumber A and Plumber B will both charge $135 if they each work 2.5 h.