Multiple Choice
If 25 mAs produce a good-density film image when a 6:1 ratio grid is used,how much mAs should be used with a 12:1 ratio grid?
A) 13 mAs.
B) 15 mAs.
C) 42 mAs.
D) 50 mAs.
Correct Answer:

Verified
Correct Answer:
Verified
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