Elizabeth is 1.05 meters tall. How tall is Elizabeth I’m millimeters?

Evaluate cos2θ for cosθ = square root of 3/2

Find the area of an equilateral triangle with a side of 6 inches

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.