What is the difference between 3.15 m and 2.006 m with the correct number of significant figures

S = 1.144

Explanation:

As we know that when we add or subtract two or more numbers then the final result must have same number of precision as that of numbers given in the problem

here we have

S = 3.15 - 2.006

so we have to give our result with 3 digits after decimal

so we will have

since it must have more precise digits so correct answer after subtraction must be

S = 1.144

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

the answer would be a