Final answer:
The car travels a distance of 480 miles during the 12-second acceleration. The car's constant acceleration is 3.33 mi/h/s.
Step-by-step explanation:
To find the distance the car travels, we can use the formula:
d = (vf - vi)t
where d is the distance, vf is the final velocity, vi is the initial velocity (which is 0 in this case), and t is the time.
Plugging in the given values, we have:
d = (40 mi/h)(12 s) = 480 miles
So, the car travels a distance of 480 miles.
To find the constant acceleration of the car, we can rearrange the formula:
vf = vi + at
solving for a, we have:
a = (vf - vi)/t
Plugging in the given values, we have:
a = (40 mi/h - 0)/12 s = 3.33 mi/h/s
So, the car's constant acceleration is 3.33 mi/h/s.