Call the production cost 'C', the revenue 'R' and the number of CDs 'n': 
C=2000+5n
R=10n
By definition Profit P = R-C, therefore P=10n-2000+5n = 5n-2000. 
        
             
        
        
        
Answer:
$1,701.64
Step-by-step explanation:
(see attached for reference)
recall that for compound interest, the following formula applies:
A = P [1 + (r/n) ] ^ (nt), where
A = final amount (we are asked to find this)
P = Principal amount = $1,200
r = interest rate = 5% = 0.05
t = 7 years
n = 12 
Substituting these into the equation, 
A = 1200 [1 + (0.05/12) ] ^ [(12)(7)]
A =  $1,701.64
 
        
             
        
        
        
30. You’d do 180 divided by 6 :)
        
                    
             
        
        
        
The coordinates of the vertices of the triangle are 
(–8, 8), (–8, –4), and<span> (10, –4)</span>.
Consider QR the base of the triangle. The measure of the base is b = 18 units, and the measure of the height is h = <span>12</span> units.
The area of triangle PQR is<span>108</span> square units.
 
        
                    
             
        
        
        
Answer:
D) (3.67, 4.73)
Step-by-step explanation:
Confidence Interval for the true average number of homes that a person owns in his or her lifetimecan be calculated using M±ME where 
- M is the average number of home owned (4.2)
- ME is the margin of error from the mean 
And margin of error (ME) can be calculated as 
ME= where
 where 
- z is the corresponding statistic in the given confidence level(1.96)
- s is the standard deviation of the sample(2.1)
- N is the sample size (60) 
Putting the numbers we get ME= ≈0.53
≈0.53
Then the 95% confidence interval is 4.2±0.53 or (3.67, 4.73)