Which modifier is used to identify a staged or related procedure?

Alzheimer's disease affects people who are ________

a. 40 to 80 b. 75 or older c. 25 to 40 d. as young as their 20s

What is the mAs if the mA station selected is 150 and time is set for .20 seconds?

30 mAs 750 mAs 3 mAs 300 mAs