The surface area of a rectangular prism is 5600 mm2.
what is the surface area of this prism, measured in cm2?
a.
0.56 cm2
b.
56,000 cm2
c.
56 cm2
d.
560 cm2

To answer the problem above, use conversion factor and dimensional analysis. Every centimeters is composed of 10 millimeters. Hence, every cm^2 is composed of 100 mm^2. Solving the given,
 
                               5600 mm^2 x (1 cm^2/ 100 mm^2) = 56 cm^2.

Thus, the answer is 56 cm^2 which is letter C. 

11/2.2 = 5 inches for the length 8.5/2.2= 3.86 inches for the width