which of the following calculations represents an incorrect use of significant digits
A. 2.0x10^2 cm^3x1.36x10^1g/cm^3g
B. 7.82g / 2.75cm = 3.1cm
C. 1.00s+2.1cm=3.1cm
D. 7.35s-2.70s=4.65

Question

which of the following calculations represents an incorrect use of significant digits
A. 2.0x10^2 cm^3x1.36x10^1g/cm^3g
B.  7.82g / 2.75cm = 3.1cm
C.  1.00s+2.1cm=3.1cm
D.  7.35s-2.70s=4.65

anonymous · Answer

all of them

shane_b · Answer

A (as written) does not have an equals sign so there's no calculation result to adjust for sigfigs.

B Has an incorrect use of sigfigs since the answer dropped a significant figure.

C & D have the correct number of sigfigs.