What's the question here?
        
             
        
        
        
Answer: Jenny would have to work 5 hours to get $85
Step-by-step explanation:
Jenny makes $17 an hour (221/13 = 17) and 85/17 is 5
 
        
             
        
        
        
You have to multiply your 20cm by 6cm and your final answer being 120 because 0 times 6 is zero and 2 times 6 is 12, then that getting you 120
        
             
        
        
        
$7.50 per hour times <span>32.5 hours equals $243.75
          $ 7.50 per hour
          x 32.5 worked hours
         ----------
          $243.75 is her check</span>
        
             
        
        
        
Answer:
 a = 1 and b = 2
Step-by-step explanation: 
Using the Quotient Rule>
d/dx[(sin x)/(2+cos x) ] 
=   [(2 + cos x) * cosx -  sin x * - sin x)]  /  (2 + cos x)^2
= 2cos x + cos^2x + sin ^2 x) /  (2 + cos x)^2
But cos^2x + sin^2x = 1 so we have:
(1 +  2 cos x)  /   (2 + cos x)^2
- so a = 1 and b = 2.