What three different angles, in degrees, where the cos of the angle is 0

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

How many days was the temperature above 90 degrees?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex