Please help Find the domain of the graphed function. A. -4 < x < 8
B. -4< x < 9
C. x is all real numbers.
D. x > - 4

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same