Bonus 1:     Simplify:  

2)  Evaluate:   

Photon beam intensity from the linear accelerator can be decreased because of

22) Multiply:  

17) Multiply:

27)  Multiply:  

24) Multiply:

A majority of the damage to human cells from radiation therapy treatments come from

The tragus 

9)  Simplify the expression. Write the results with only positive exponents.