I am not aware of any statute that sets the minimum/maximum distance you must be from the car in front of you when stopped at a stop light. Most safety experts recommend leaving enough distance between cars so that the you (as the driver) can actually see the rear bumper of the car in front of you.
Red light road sign
10 inches
100 feet
Hippos have two front feet and two back feet, for a total of four feet.
2340 light years = 7.26316*1019 feet
3
2 back and 2 front
2,100 light years = 6.51808059 × 1019 feet
There are 2.13 feet.
There is about 1,267,200,000 feet.
2000000 ft
You can't convert between feet and square feet.