During the initial phase of an outbreak of Covid-19 pandemic in the Philippines, the number of cases have grown rapidly. If there were 3, 9, and 15 infected persons on the first three days of the outbreak of Covid-19 and counting, how many will be possibly infected on the 10th day?
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Answer:
21
Step-by-step explanation:
distance=6
3+6=9
9+6=15
15+6=21