Large doses of excitotoxic chemicals kill neurons by stimulating them to death, whereas lower doses stimulate neurons without killing them

Overall, about ________ of all arrests for serious crimes involved a person under the age of 18

A) 40% B) 16% C) 65% D) 7%

About what percent of people age 65 and older live in poverty?

a) 5% b) 10% c) 15% d) 20%