Suppose a human population exhibits a Type III survival curve. What would you expect to happen to the curve over time if a dramatic improvement in medical technology takes place

The curve will become convex  

Explanation:

A survivorship curve is a graph that displays the proportion of individuals capable of surviving based on their age ranges or other population parameters such as, for example, the survival rate of males and females. A Type III survivorship curve has a concave shape because individuals exhibit a high death rate immediately after birth. Examples of species that show a Type III curve include, among others, insects, fishes and small mammals.

not sure if this what   you'r looking for would be percent composition