Let the price of flowers in September be x, then (100 + 20)/100 * x = $1.50
120/100 * x = $1.50
1.2x = $1.50
x = $1.50/1.2 = $1.25
The price of flowers in September is $1.25
Total money realised in September = $1.25 x 900 = $1,125
40% earned = 0.4 x $1,125 = $450
Total money realised in October = $1.50 x 700 = $1,050
40% earned = 0.4 x $1,050 = $420
The class earned more money in September and they earned $30 more than in October.
        
             
        
        
        
The final amount of the compound interest after 6 years would be $ 294, 122, 500
<h3>How to determine the final amount</h3>
The formula for the final amount is given as;

Where 
A = final amount
P = principal interest
r = interest rate
n = number of times
t = time of periods
We have,
A =  
 
A = 
A =  ×
 × 
A =$ 
Thus, the final amount of the compound interest after 6 years would be $ 294, 122, 500
Learn more about compound interest here:
brainly.com/question/24924853
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Answer:
C
Step-by-step explanation:
Assembly 
That's the answer 
I think