Elevator 1 moved up 12 feet from the ground level. Its position is labeled as +12. Elevator 2 moved down 7 feet from the ground level. Its position is labeled as . (Use the hyphen for negative such as -1

-7

Step-by-step explanation:

If elevator 1 moved up 12 and is now labelled +12, that means we can say that elevator 1 went in the "positive" direction.

Meanwhile, elevator 2 moved down, which is the opposite of up. That means we can say that elevator 2 is moving in the "negative" direction. So since it moved down 7, we can say that it is now at the position labelled "negative 7", which is denoted by -7.

Hope this helps!

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)