At a certain time of day, a person 6 feet tall casts a 4-foot shadow. how long is the shadow cast by a 21-foot tree at the same time?

It states that children are born with an innate ability to understand and learn languages

Which of the following reflect a period of détente in the Cold War? A. Conflicts in Korea and Vietnam B. Publications such as NSC-68 C. Nuclear disarmament talks D. Events like the Cuban Missile Crisis

Passive solar energy systems include which of the following? A) solar collectors B) wind turbines C) overhangs D biomass storage units

Which of the following groups might sign a non-disclosure agreement between them? the local government and its citizens a group of employees or contractors a company and an employee or contractor two competing businesses or companies

Environmental science jobs are expected to grow by how much between now and 2016? A) 5% B) 15% C) 25% D) 100%

Do u have someone ur in love with? This is a scientific poll for my science fair project.

How do i get my parents to buy me led strip lights?

How does hunger affect our behavior?

The first big battle of the Civil War took place at Fort Sumter. Which state was it in? A: North Carolina B: South Carolina C: New Hampshire D: New York

In which of the following world regions would a primate city hierarchy most likely be found? A) Africa B) Australia C) Russia D) North America