Answer:

Step-by-step explanation:

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Medical bill = $8,440
Deductible = $400
Coinsurance plan = Medical policy 80% of all expenses above $400
Amount to pay = 400+ (8440-400)*20/100 = 400+1608 = $2,008
320 pounds of algea. After 4 hours, it would be 80, After 8 hours, 160. After 12 hours, 320