Answer
Instead of underlining the significant figures, I will only list the significant figures in the answer:
a)41
b)41
c) 410
d)4.0100
Work Step by Step
a) Any nonzero number is significant
b) Zeroes before nonzero numbers in a number less than one are nonsignificant
c)Trailing zeroes in a number less than one are significant
d) All numbers, including zeroes, included in a scientific notation form of a number are significant
