At 9 am a car (a) began journey from a point, traveling at 40 mph. at 10 am another car (b) started traveling from the same point at 60 mph in the same direction as car (a). at what time will car b pass car a?

d

step-by-step explanation:

d

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers