(a) No. (b) Yes. (c) Yes. (d) Yes. (e) No.
Work Step by Step
(a) Zeros to the left of the first nonzero number are always not significant. (b) Zeros between two nonzero digits are always significant. (c) The point after the last zero indicates that they are significant. (d) Zeros to the right of the decimal point and after the first nonzero digit are significant. (e) Zeros to the right of the last nonzero digit are only significant if there is a decimal point, in this case, there is no decimal point, so they are not significant.