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.
When you can see the rear tires on the car in front of you touching the road.
In most states I think itis 15 feet or more.
You should always leave enough distance between you and the car in front when you are stationary to be able to manoeuvre round them should their car fail to move.
Depends how fast your going, but you should start tapping on your breaks when your coming on a intersection so you have time to stop without having to slam on your breaks.
Red light road sign
10 inches
100 feet
Hippos have two front feet and two back feet, for a total of four feet.
Depends on how big your feet are.
2340 light years = 7.26316*1019 feet
2,100 light years = 6.51808059 × 1019 feet
3
2 back and 2 front
2000000 ft
There are 2.13 feet.
There is about 1,267,200,000 feet.