11 Find the mean of the given probability distribution. Round appropriately. x P(x) 1 0.15 2 0.29 3 0.43 4 0.13

18 If a binomial experiment were conducted with 12 trials, with probability of success on each trial 0.6, find the minimum usual value if the experiment were conducted many times.

14 Assume binomial: n = 8, p = 0.45, find P(4)

What is shown at the blue arrow?(Green)

What structure is at the arrow?(Bulges)

Calculate the effective field size for a 20 x 18 cm field with a triangular corner block measuring 7 cm x 3 cm. 

Determine the width of the geometric penumbra of a Cobalt-60 beam at 8 cm depth in a patient undergoing treatment at 87 cm SSD. The source diameter is 3 mm and the patient’s surface is 41 cm from the distal end of the collimator. 

Match the depth dose curve with the radiation that produced it. Cobalt-60 Superficial therapy Grenz rays Orthovoltage Contact therapy   1. ______ curve a   2. ______ curve b   3. ______ curve c   4. ______ curve d   5. ______ curve e

For any positive integer n,  =

Which of the following is true about the floor and ceiling functions?