When is a door not really a door?

What do cat say? like what they say?

Robbie is trying to learn as much as he can about a rock that he found. This particular rock contains some fossils. What can Robbie learn from the fossils?

A koala must eat 200 grams of leaves each day to survive. The trees in an area can provide 1,380 grams of leaves per day. What is the maximum number of koalas that can survive in the area?

An experimenter is studying whether cell phone use and attention span are related. They ask people how many hours a day they are on the phone and then have them complete a difficult puzzle and measure completion time.

How is matter alike and different on the atomic/molecular level?

F (x) = x2 + 1 g (x) = 5 - x (f + g) (x) =

What is the highest math level needed for the SAT?

The wheels on your car are spinning at 625 revolutions per minute. The car travels 8 feet every time the wheels spin around 1 revolution. How many miles per hour are you traveling? Round to the nearest integer.

One of the same side angles of two parallel lines is 20° smaller than the other one. Find all angles.

A deep and meaningful kind of sharing between two people