Davna is born September 5, 2010. Kiley is born February 14, 2010. Whose birthday comes first in the year? Who is older?

Evaluate cos2θ for cosθ = square root of 3/2

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?