Exposure - Being exposed to ionizing radiation, radioactive material, or other hazardous materials. Radiation exposure is measured in Roentgens (R) or the subunit milliroentgens (mR). For practical. purposes, one roentgen is equal to one rem.
A credit score of 760-799 is considered good to great credit, and will typically result in interest rates and approval rates that a credit score in the 800-850+ bucket would yield. The only difference might be a few more pricing incentives at the 800-850+ range, and a more thorough credit check.
1 In the Fair, Isaac credit bureau systems, which is probably what you've got in mind, the range is from somewhere in the low 300's to something close to 900..  2 A score range may be 0-800, 40-400, or some other range of numbers..  FICO scores range from 300 to 850..