47) The quantity 1.0 mg/cm² is the same as 1.0 x kg/m^2
A)10^-4
B) 10^2
C) 10^-6
D) 10^-2
E) 10^4

Using dimensional analysis:

1.0 mg/cm^2 * (1kg/1000000mg) * (10000cm^2/m^2)

All of the units cancel except for kg/m^2:

1.0 * (1/1000000) * (10000) kg/m^2
.010 kg/m^2

Thus, the answer is:
D) 10^(-2)