An elevator starts on the 100 th floor of a buildinf it decends 4 floors every 10 seconds at what floor will the elevator be in 60 seconds after it starts

It will be on the 76th floor.

10=4

60=24

4x6.0= 24

76th floor.
There are 100 floors. 60 seconds divided by 10 is 6. 6×4 floors=24 floors. This means the elevator went down 24 floors. 100-24 is 76. Hope I helped :)