Answer:
1. - 15 1/2 feet
2. 62 3/4 feet
3. 0 feet
Step-by-step explanation:
1. Descend means negative, so the answer needs to have a negative sign.
2. Above sea level means positive, so the answer needs to have a positive sign.
3. There is no change in position, so the answer needs to be 0.
hope this helps and is right!! p.s. i really need brainliest :)
