Graph f(x) = 8•1.2 to the power of x and solve

How do i do this? i don’t understand

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?