A radiograph is made using film X with an exposure of 10 mA-min. Film density in the area of interest is 1.0. If it is desired to achieve a density of 2.0 in the area of interest, what exposure is required? (Log relative exposure = 1.1 for a density of 1.0 and 1.62 for a density of 2.0)

• A. 41.67 mA-min
• B. 10 mA-min
• C. 12.6 mA-min
• D. 33.1 mA-min