Can you help solve questions a through C

Final Exam Version 1 MAT212 1.) In a particular city, taxicabs charge passengers $2.50 for entering a cab, and then $0.30 for each one-fifth of a mile (or fraction thereof) traveled. If x represents the distance traveled in miles, then C(x) is the cost of the taxi fare, where C(x)=$2.50 if x=0, C(x)=$2.80 if 0