Answer:
Step-by-step explanation:
The area of an equilateral triangle with side length is equal to . Since the perimeter is 24 units and there are three equal sides to an equilateral triangle, each side is units.
Substituting in this value, we get:
martina is 22 feet below sea level
Marina goes down 20 feet
then rises 7 feet which is 20 - 7 = 13
then goes down 9 more feet which is 13 + 9 = 22 feet
20 - 7 + 9 =22
Martina is 22 feet below sea level.
c hope this helps