Can someone explain the answer for this question please? -metrology

Metrology is “the science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology,” as defined by the International Bureau of Weights and Measures  

Explanation:

In simple terms, Metrology is the study or science of measurement. Metrology provides the quality assurance behind modern-day manufacturing processes. It is the science that enables production lines to produce thousands of identical pieces of sophisticated equipment.

answer:

look in settings

explanation:

import math

x=int(input("enter a number: "))

print (math.sqrt(math.fabs(