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.
581-590 Credit Score: A score in this range is evident of a poor credit history, which is a turn-off for many lenders. 591-600 Credit Score: Get your score up to 600 to become eligible for more types of loans and at lower interest rates. This is still borderline poor credit.
FICO credit scores range from 300-850. FICO no longer releases the median nationwide score, but as of April 2014, the national median FICO score was 692. Keeping that median in mind, a 620 minimum is fairly borrower-friendly.