Final answer:
The nominal dimensions of a standard brick are 8 x 2 1/4 x 4 inches, and they are converted to millimeters using the factor of 1 inch equals 25.4 millimeters. The correct conversion of the dimensions 4 x 2 x 12 inches to millimeters is 102 x 51 x 305mm.
Step-by-step explanation:
The nominal dimensions of a standard brick in inches are 8 x 2 1/4 x 4 inches, and these are usually used by manufacturers when referring to bricks in architectural settings. However, the actual dimensions will be slightly less to allow for mortar joints in construction. In the given options, the conversion from inches to millimeters for the size 4 x 2 x 12 inches is correctly represented as 102 x 51 x 305mm. Therefore, the accurate nominal dimensions in millimeters would follow this same conversion rate using the inch to millimeter conversion factor of —inch equals 25.4mm.
It's important to remember that these dimensions represent nominal sizes, which include the mortar joint size. The actual size of a brick can be about 3/8 inches smaller in each dimension. When converting nominal brick dimensions to millimeters, it is vital to use the correct conversion factor, which is 1 inch equals 25.4 millimeters. Given the choices, the correct option is 1) 4 x 2 x 12 in. (102 x 51 x 305 mm).