The US started collecting federal income tax in 1913
        
                    
             
        
        
        
It should be noted that in the Production Oriented Era,manufacturers focused on product innovation, rather than satisfying the needs of individual customers.
<h3>What is Production Oriented Era?</h3>
Production Oriented Era can be regarded as an era in which manufacturers were concerned with product innovation, they do this instead of meeting customers needs.
In this era Retailers were considered places to hold inventory until it was sold.
Learn more about Production Oriented Era at:
brainly.com/question/6264918
 
        
             
        
        
        
Answer:
1. Dave has 23 ($10 coins) and 18 ($20) coins.
2. Dave has 18 ($10 coins) and 16 ($20) coins.
Explanation:
1.
Let x be the number of $10 coins.
Then, the number of $20 coins will be 41-x.
The equation for the sum of money can be written as:
590 = 10x + 20 * (41-x)
590 = 10x + 820 - 20x
590 - 820 = -10x
-230 / -10 = x
x = 23
This means that Dave has 23 $10 coins and (41-23 = 18) 18 $20 coins that sum up to a face value of $590.
2.
Using the same priciple, 
let x be the number of $10 coins
let 34-x be the number of $20 coins
Sum of money equation:
500 = 10x + 20 * (34-x)
500 = 10x + 680 - 20x
500 - 680 = -10x
-180 / -10 = x
x = 18
So, Dave has 18 $10 coins and (34-18 = 16)  16 $20 coins that add up to a face value of $500.
 
        
                    
             
        
        
        
Consumer demand, Opportunity cost
        
                    
             
        
        
        
Answer:
they are afraid of hearing any negative feedback