Question

A scientist uses a submarine to study ocean life.

• She begins at sea level, which is an elevation of o feet.
She travels down 72.8 feet.
She then travels directly up 25.3 feet.
Next, she travels down a second time, 68.7 feet.
.
.
.
How many feet must she now ascend to get back to sea level?

Answer 1

116,2 feet

Explanation:

call sea level is start point:

0 (sealevel) - 72,8 (1st travel down) + 25,3( 1st travel up) - 68,7( 2nd travel down) = -116,2 (minus)

so the scientist must travel up 116,2 feet to get back to the sea level