Answer:
<em>a. 22.64%</em>
Explanation:
At first we are going to need to compute the Internal rate of return(IRR) (in which the current value of inflows = the current value of outflows) 
Let's let the IRR be <em>x percent</em> 
Therefore $4,500 = $750 / (1.0x) 
+ $1,000 / (1.0x) <em>power 2</em> + $850 / (1.0x) <em>power 3 </em>
+ $6,250 / (1.0x) <em>power 4</em> 
Thus, x = approximate return rate = <em>22.64 percent</em>
 
        
             
        
        
        
<span>Description of this experiment: This type of experiment would be deemed as completely randomized, as the subjects are chosen at random to watch the commercial. The subjects are 15 children under 10 years old. The different factors in this experiment are the commercials, as well as the 3 levels of products (types). The response in this experiment would be the children's attention span.</span>
        
             
        
        
        
Answer:
I think so buh I’d advice u to make it its correct