Cheese I'm so sorry for not having an answer I failed you
Answer:
5.38035 m
Explanation:
= Refactive index of water = 1.43
h = Depth = 5.5 m
Critical angle is given by

d = horizontal distance from the post where she no longer see the bottom of wooden post
So,

The distance d is 5.38035 m
Answer:
c. lumber
Explanation:
Lumber is considered a renewable natural resource because it is gotten from trees and trees are grow-able. A renewable natural resource is a resource which can be used repeatedly and replaced naturally. Examples of renewable natural resources are solar energy from the sun, water, oxygen, biomass, trees etc. Trees can be harvested and processed into lumber. The harvested trees can be planted again by humans or they can naturally reproduce through seedlings or fruits that drop and germinate on their own. This renewable germinating process of trees makes lumber a renewable natural resource.