I will reward you with the brainiest if you answer correctly.

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Evaluate cos2θ for cosθ = square root of 3/2