Answer:
72
Step-by-step explanation:
 
        
             
        
        
        
Answer:
174
Step-by-step explanation:
L = 68
W=19
Use the formula given:
2 x 68 + 2 x 19 = 174
 
        
             
        
        
        
The answer for the question is 2:5
        
             
        
        
        
So... let's say the amounts invested were "a" at 6% and "b" at 7.5%.
ok.. hmm what's 6% of a? well, (6/100) * a or 0.06a.
what's 7.5% of b? well, (7.5/100) * b or 0.075b.
now... we know, whatever "a" and "b" are, they total the investment of 5000 bucks, thus 
a + b = 5000and the interest yielded was 337.50, thus 
0.06a + 0.075b = 337.50thus    

solve for "a", to see how much was invested at 6%.
what about "b"?  well, b = 5000 - a.
 
        
        
        
Answer:
Help what? 
Step-by-step explanation: