In a recent survey, 36 people, or 20% of the people were surveyed, said they had never been out of the continental United States. How many people were surveyed?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.