Question

A scuba diver is diving at a constant rate when her

team on the surface requests a status update. She
looks at her watch which says her elevation is 18 feet
below sea level. 8 seconds later, her elevation is 20
feet below sea level.
2. How many more seconds until she reaches her
goal depth of 50 feet? Explain or show your
reasoning.

Answer 1

-0.25 ; 120 seconds 72 seconds

Explanation:

Dive rate is constant :

Change in elevation after 8 seconds :

18 feets to 20 feets below

Rate of change = distance / time

(18 - 20) feets / 8 seconds

(-2 / 8) = - 0.25 feets per second

To reach 50.feets :

She needs to cover (50 - 20) = 30 feets

Time = distance / speed ; 30 feets / 0.25 = 120 seconds