Which best describes the association between the number
of years since 2003 and the amount of lead in the air?

Simplify the rational expression. state any restrictions on the variable. t^2-4t-12 / t-8 the / is a fraction sign.

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?