please help to let me know if answers are correct and explain the numbers with trailing zeros

1.wo.. .Hane sure w rejer to your Notes 2 C on the proper answer for this type of number for the class. B. Rounding /SF \& SN Complete the table. C. Addition/Subtraction - Hint: Pay attention to exact numbers. These numbers have infinite sig figs and do not limit the sig figs of the final rounded answer. 1. How many sig figs should the final answer have? 9.98m+4.555m+2.6m=17.135a(unroundedanswer)=1.7135Apd(finalanswerroundedtothecorrectSF) 2. 65.5s+2.5s61s=7 (unrounded answer) =710 (final answer rounded to the correct SF) 3. What is 45C in Kelvin (K),K=C+273.15 Show the calculation below. =318.15C (unrounded answer) =3.1815102 (final answer rounded to the correct SF )