(a) In $1.454 \times 10^{1}$, the first three significant digits are 1, 4, and 5.
(b) In $1.455 \times 10^{2}$, the first three significant digits are 1, 4, and 5.
(c) In $1.508 \times 10^{-3}$, the first three significant digits are 1, 5, and 0.
(d) In $1.503
Show more…