When should firefighters wear seat belts?

During the process of coherent scattering, an incident low-energy x-ray photon interacts with

a. a single inner-shell electron, ejecting it from its orbit. b. a single outer-shell electron, ejecting it from its orbit. c. an atom and may transfer its energy by causing some or all of the electrons of the atom to momentarily vibrate and radiate energy in the form of electromagnetic waves. d. a scattered photon of lesser energy, annihilating it.

If a TRICARE Prime beneficiary seeks treatment from a civilian provider without approval, the beneficiary is responsible for ____________________ percent of the cost of the service after the deductible is met.

Fill in the blank(s) with the appropriate word(s).