Wake County has a special emergency rescue team. The team is practicing rescuing dummies from a smoke-filled building. The first time the team took 240 seconds (four minutes). The second time it took 180 seconds (three minutes).
a. (*) What is the estimated learning rate for the rescue team based on this information?
b. (**) Suppose the team’s learning rate for the rescue exercise is 80%.How many times will the team need to repeat the exercise until its time is less than 120 seconds (50% of the original time)?
c. (**) How long will it take the emergency team to perform its 20th rescue if the learning rate is 80%?
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