Application #4 What is the relationship between income and access to improved water sources, sanitation, and electricity? Why would this matter? Application #5 Compare the quality of life for people living below $100 per month (less than $3 per day). Even though these people do not live in the same parts of the world, what are common traits in their experience? Compare the people living with incomes above $1000/month ($33 + per day). What are common traits?

Answer(1) year suspended

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .