How did the invention of the astrolabe vasco da gama make his voyage to india?

answer; first blank(1); 30% two(2); salmonella; i believe this is correct; //good luck;

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.