Which source contributes the most to a person's radiation exposure?

Which can be an effective way to reduce stress? a) getting in the habit of doing things perfectly the first time b) engaging in a fun physical activity on a regular basis c)taking an antacid for a stress-based stomachache d)studying extra hard the night before a test

How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels by damaging or changing a cell's dna by increasing heart rate by increasing phlegm and mucous production

Cammy is cooking hamburger patties for lunch. after a few minutes on the grill, she checks the internal temperature of the patties and finds them to be at 135°f. what should cammy do next?