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Three people are floating on a 120 .- raft in the middle of a pond on a warm summer day. They decide to go swimming, and all jump off the raft at the same time and from evenly spaced positions around the perimeter of the raft. One person, with a mass of , jumps off the raft at a speed of . The second person, of mass , jumps off the raft at a speed of . The third person, of mass , jumps off the raft at a speed of . At what speed does the raft drift from its original position?
The headline on a Chronicle of Higher Education article reads “College Costs Rise Faster than Inflation.” The article states that tuition at public colleges and universities increased by 58% over the past 5 years. (a) What was the average annual percentage increase over that period of time? (b) If the real increase in tuition (i.e., without inflation) was 5% per year, what was the inflation rate per year?