Convert the fraction to a decimal 40/100

What are the answers for the following questions?

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books

Above is the big island of hawaii. if the sea levels rise by a couple of inches, predict what changes will coconut on the island (list 3-4)