Y=4(.98)^x-1. please help asap

In the diagram below what is the approximate length of the minor arc ab

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?