1. There is a rumor going around. On the first day 10 people find out, five days later 160 people find out about the rumor. How many people will know the rumor by day 10?
2. Juliana loves books. Every Friday she buys books. The first Friday she bought 3 books, and from that Friday on, every time she bought books she bought three more than the ones she had bought the week before. How many books would she have bought in total after a year of buying books?
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