If tan(x) = 6/8 what is cos (2x), given that 0 < x < π/2 ?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?