an elevator is moving up at a rate of one meter per second. the elevator is now at the street level. when was the elevator five meters below street level? when will the elevator be 10 meters above street level?

Answer 1

Just think about it.
Every second it travels 1 meter.

So, 5 seconds ago it was down 5 meters.

now think forward in time for 120 meters above.

Answer 2

Math