Question

7th grade math help me plzzzz

Answer 1

Answer:

She must ascend 30.6 to be back at sea level

Step-by-step explanation:

0-10.7= -10.7

-10.7+8.6=-2.1

-2.1-28.5=-30.6

-30.6+30.6=0

Answer 2

Answer:

she needs to to go up 30.6 feet.

I might be wrong