Please help on #4 it would help me if you show your work because I don't understand how to do this

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?