Question

Which marine ecosystem has the fewest available nutrients and the lowest productivity?
A) estuaries
B) open ocean
C) coral reefs
D) continental shelf

Answer 1

The correct answer is : Open Ocean

Since the open ocean is really far from the land soil, the water consist almost no nutrients . And since it's really far away from the coast, there's almost no productivity around here ( almost no human is brave enough to go to the open ocean)

Answer 2

23.46 is the answer... you the equation is not factorable so you had to use the quadratic formula