What percent of adults age 75 years or older have hearing impairment?

Heatstroke occurs when:

A. the outside temperature exceeds 90°F. B. the body's heat-eliminating mechanisms are overwhelmed. C. a person becomes dehydrated from excess perspiration. D. the humidity exceeds 80%.

A healthy adult can tolerate blood loss of up to ____ mL over a period of 15 to 20 minutes without any negative effects.

A) 500 B) 750 C) 1,000 D) 1,500