Efficiency is a measure of B. how productively resources are used to achieve a goal.
Efficiency measures the ratio of economic output to the total input of resources.
Mathematically, efficiency can be expressed as r = P/C, where:
Thus, Efficiency is a measure of B. how productively resources are used to achieve a goal.
Learn more about Efficiency at https://brainly.com/question/14722433
#SPJ12