Although betty grew up in a rundown neighborhood, had divorced parents, and rarely saw her father, she is a successful, happy, and healthy adult. betty's ability to adapt effectively in the face of threats to development is known as

6.3%

explanation:

the acceptance rate for yale university is 6.3%. this means that only 6 percent of people who apply actually get accepted!

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.