1)
(A)
3 Trailing zeros are significant if the # contains a decimal point.
(B)
4 Captive zeros are always significant.
(C)
2 Leading zeros are never significant.
(D)
3 Captive zeros are always significant.
(E)
4
Trailing zeros are significant if the # contains a decimal point.
2)
(A)
25.7g
(B)
4750m
(C)
0.0120L
(D)
8.88 x 10
-4
km
3)
12.1
11.98
12.243
+11.81
48.133 → 48.1
Value has the same # of decimal places as the # in
the calculation with the fewest decimal places.
48.1
=
12.025 →
12.0g
4
The answer has 3 sig figs because 4 is an exact # and 48.1 has

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